diff --git a/apps/server/src/testing/http/document-series.integration.test.ts b/apps/server/src/testing/http/document-series.integration.test.ts
new file mode 100644
index 00000000..33fc13ff
--- /dev/null
+++ b/apps/server/src/testing/http/document-series.integration.test.ts
@@ -0,0 +1,312 @@
+import assert from "node:assert/strict";
+import { randomUUID } from "node:crypto";
+import test from "node:test";
+
+import { QueryTypes } from "sequelize";
+
+import { DocumentSeriesNumberAssigner } from "../../../../../modules/document-series/src/api/application/services/document-series-number-assigner.ts";
+import { SequelizeDocumentSeriesDomainMapper } from "../../../../../modules/document-series/src/api/infrastructure/persistence/sequelize/mappers/sequelize-document-series-domain.mapper.ts";
+import { SequelizeDocumentSeriesRepository } from "../../../../../modules/document-series/src/api/infrastructure/persistence/sequelize/repositories/document-series.repository.ts";
+
+import {
+  buildCompanyHeaders,
+  createTestAccount,
+  createTestCompany,
+  createTestMembership,
+  loginByApi,
+} from "./http-test-fixtures.ts";
+import { createHttpTestRuntime } from "./http-test-runtime.ts";
+
+type SeriesRow = {
+  id: string;
+  company_id: string;
+  document_type: string;
+  code: string;
+  name: string;
+  prefix: string | null;
+  next_number: number;
+  is_default: number;
+  is_active: number;
+  has_assigned_numbers: number;
+};
+
+async function createSession(runtime: Awaited<ReturnType<typeof createHttpTestRuntime>>) {
+  const account = await createTestAccount(runtime.database, {
+    email: `document-series-${randomUUID()}@example.test`,
+    password: "Password123!",
+  });
+  const company = await createTestCompany(runtime.database, { legalName: "Document series test" });
+  await createTestMembership(runtime.database, { accountId: account.id, companyId: company.id });
+  const login = await loginByApi({
+    request: runtime.request,
+    email: account.email,
+    password: account.password,
+  });
+  assert.equal(login.status, 200);
+  assert.equal(typeof login.body, "object");
+  assert.notEqual(login.body, null);
+  const accessToken = (login.body as { access_token: string }).access_token;
+  return {
+    company,
+    headers: {
+      ...buildCompanyHeaders({ accessToken, companyId: company.id }),
+      "content-type": "application/json",
+    },
+  };
+}
+
+async function findSeries(runtime: Awaited<ReturnType<typeof createHttpTestRuntime>>, id: string) {
+  const rows = await runtime.database.query<SeriesRow>(
+    "SELECT id, company_id, document_type, code, name, prefix, next_number, is_default, is_active, has_assigned_numbers FROM document_series WHERE id = :id",
+    { replacements: { id }, type: QueryTypes.SELECT }
+  );
+  return rows[0] ?? null;
+}
+
+async function createSeries(params: {
+  runtime: Awaited<ReturnType<typeof createHttpTestRuntime>>;
+  headers: Record<string, string>;
+  code: string;
+  documentType?: "proforma" | "issued_invoice";
+  nextNumber?: number;
+  isDefault?: boolean;
+  isActive?: boolean;
+}) {
+  const response = await params.runtime.request("/api/v1/document-series", {
+    method: "POST",
+    headers: params.headers,
+    body: JSON.stringify({
+      document_type: params.documentType ?? "proforma",
+      code: params.code,
+      name: `Series ${params.code}`,
+      next_number: params.nextNumber ?? 100,
+      padding: 3,
+      is_default: params.isDefault ?? false,
+      is_active: params.isActive ?? true,
+    }),
+  });
+  assert.equal(response.status, 201);
+  assert.equal(typeof response.body, "object");
+  assert.notEqual(response.body, null);
+  return response.body as { id: string };
+}
+
+test("document-series HTTP persiste creación, asignación y avance en MariaDB", async (t) => {
+  const runtime = await createHttpTestRuntime();
+  t.after(async () => runtime.stop());
+  const session = await createSession(runtime);
+  const created = await createSeries({
+    runtime,
+    headers: session.headers,
+    code: "PF",
+    nextNumber: 100,
+  });
+
+  const createdRow = await findSeries(runtime, created.id);
+  assert.ok(createdRow);
+  assert.equal(createdRow.company_id, session.company.id);
+  assert.equal(createdRow.code, "PF");
+  assert.equal(createdRow.document_type, "proforma");
+  assert.equal(createdRow.next_number, 100);
+  assert.equal(createdRow.is_active, 1);
+  assert.equal(createdRow.is_default, 0);
+  assert.equal(createdRow.has_assigned_numbers, 0);
+
+  const first = await runtime.request("/api/v1/document-series/assign-next", {
+    method: "POST",
+    headers: session.headers,
+    body: JSON.stringify({ document_type: "proforma", series_code: "PF" }),
+  });
+  assert.equal(first.status, 200);
+  assert.deepEqual(first.body, {
+    series_id: created.id,
+    series_code: "PF",
+    number: "100",
+    reference: "100",
+  });
+  const afterFirst = await findSeries(runtime, created.id);
+  assert.ok(afterFirst);
+  assert.equal(afterFirst.next_number, 101);
+  assert.equal(afterFirst.has_assigned_numbers, 1);
+
+  const second = await runtime.request("/api/v1/document-series/assign-next", {
+    method: "POST",
+    headers: session.headers,
+    body: JSON.stringify({ document_type: "proforma", series_code: "PF" }),
+  });
+  assert.equal(second.status, 200);
+  assert.equal((second.body as { number: string }).number, "101");
+  const afterSecond = await findSeries(runtime, created.id);
+  assert.ok(afterSecond);
+  assert.equal(afterSecond.next_number, 102);
+  assert.equal(afterSecond.has_assigned_numbers, 1);
+
+  const advance = await runtime.request(`/api/v1/document-series/${created.id}/next-number`, {
+    method: "PATCH",
+    headers: session.headers,
+    body: JSON.stringify({ next_number: 150 }),
+  });
+  assert.equal(advance.status, 200);
+  const afterAdvance = await findSeries(runtime, created.id);
+  assert.ok(afterAdvance);
+  assert.equal(afterAdvance.next_number, 150);
+  assert.equal(afterAdvance.has_assigned_numbers, 1);
+
+  for (const nextNumber of [150, 149]) {
+    const rejected = await runtime.request(`/api/v1/document-series/${created.id}/next-number`, {
+      method: "PATCH",
+      headers: session.headers,
+      body: JSON.stringify({ next_number: nextNumber }),
+    });
+    assert.equal(rejected.status, 422);
+    assert.equal((await findSeries(runtime, created.id))?.next_number, 150);
+  }
+});
+
+test("document-series HTTP mantiene default, estado, aislamiento y update restringido", async (t) => {
+  const runtime = await createHttpTestRuntime();
+  t.after(async () => runtime.stop());
+  const session = await createSession(runtime);
+  const a = await createSeries({ runtime, headers: session.headers, code: "A" });
+  const b = await createSeries({ runtime, headers: session.headers, code: "B" });
+  const invoice = await createSeries({
+    runtime,
+    headers: session.headers,
+    code: "F",
+    documentType: "issued_invoice",
+    isDefault: true,
+  });
+
+  for (const id of [a.id, b.id]) {
+    const response = await runtime.request(`/api/v1/document-series/${id}/default`, {
+      method: "PATCH",
+      headers: session.headers,
+    });
+    assert.equal(response.status, 200);
+  }
+  assert.equal((await findSeries(runtime, a.id))?.is_default, 0);
+  assert.equal((await findSeries(runtime, b.id))?.is_default, 1);
+  assert.equal((await findSeries(runtime, invoice.id))?.is_default, 1);
+
+  const createdDefault = await createSeries({
+    runtime,
+    headers: session.headers,
+    code: "C",
+    isDefault: true,
+  });
+  assert.equal((await findSeries(runtime, b.id))?.is_default, 0);
+  assert.equal((await findSeries(runtime, createdDefault.id))?.is_default, 1);
+
+  const disable = await runtime.request(`/api/v1/document-series/${b.id}/disable`, {
+    method: "PATCH",
+    headers: session.headers,
+  });
+  assert.equal(disable.status, 204);
+  assert.equal((await findSeries(runtime, b.id))?.is_active, 0);
+  assert.equal((await findSeries(runtime, b.id))?.is_default, 0);
+  const enable = await runtime.request(`/api/v1/document-series/${b.id}/enable`, {
+    method: "PATCH",
+    headers: session.headers,
+  });
+  assert.equal(enable.status, 200);
+  assert.equal((await findSeries(runtime, b.id))?.is_active, 1);
+  assert.equal((await findSeries(runtime, b.id))?.is_default, 0);
+
+  const update = await runtime.request(`/api/v1/document-series/${a.id}`, {
+    method: "PUT",
+    headers: session.headers,
+    body: JSON.stringify({
+      name: "Renamed",
+      prefix: "P-",
+      code: "OTHER",
+      next_number: 999,
+      is_default: true,
+    }),
+  });
+  assert.equal(update.status, 200);
+  const afterUpdate = await findSeries(runtime, a.id);
+  assert.ok(afterUpdate);
+  assert.equal(afterUpdate.name, "Renamed");
+  assert.equal(afterUpdate.prefix, "P-");
+  assert.equal(afterUpdate.code, "A");
+  assert.equal(afterUpdate.next_number, 100);
+  assert.equal(afterUpdate.is_default, 0);
+
+  const inactive = await createSeries({
+    runtime,
+    headers: session.headers,
+    code: "I",
+    isActive: false,
+  });
+  const inactiveDefault = await runtime.request(`/api/v1/document-series/${inactive.id}/default`, {
+    method: "PATCH",
+    headers: session.headers,
+  });
+  assert.equal(inactiveDefault.status, 422);
+  assert.equal((await findSeries(runtime, inactive.id))?.is_default, 0);
+
+  const rejectedCreate = await runtime.request("/api/v1/document-series", {
+    method: "POST",
+    headers: session.headers,
+    body: JSON.stringify({
+      document_type: "proforma",
+      code: "INVALID",
+      name: "Invalid default",
+      next_number: 100,
+      padding: 0,
+      is_active: false,
+      is_default: true,
+    }),
+  });
+  assert.equal(rejectedCreate.status, 422);
+  const invalidRows = await runtime.database.query<SeriesRow>(
+    "SELECT id, company_id, document_type, code, name, prefix, next_number, is_default, is_active, has_assigned_numbers FROM document_series WHERE company_id = :companyId AND code = :code",
+    { replacements: { companyId: session.company.id, code: "INVALID" }, type: QueryTypes.SELECT }
+  );
+  assert.equal(invalidRows.length, 0);
+
+  const other = await createSession(runtime);
+  const forbidden = await runtime.request(`/api/v1/document-series/${a.id}`, {
+    headers: other.headers,
+  });
+  assert.equal(forbidden.status, 404);
+  assert.equal((await findSeries(runtime, a.id))?.company_id, session.company.id);
+});
+
+test("document-series revierte contador y hasAssignedNumbers con una transacción MariaDB real", async (t) => {
+  const runtime = await createHttpTestRuntime();
+  t.after(async () => runtime.stop());
+  const session = await createSession(runtime);
+  const created = await createSeries({
+    runtime,
+    headers: session.headers,
+    code: "RB",
+    nextNumber: 200,
+  });
+  const assigner = new DocumentSeriesNumberAssigner(
+    new SequelizeDocumentSeriesRepository(
+      new SequelizeDocumentSeriesDomainMapper(),
+      runtime.database
+    )
+  );
+
+  await assert.rejects(
+    () =>
+      runtime.database.transaction(async (transaction) => {
+        const assigned = await assigner.assignNext({
+          companyId: session.company.id,
+          documentType: "proforma",
+          seriesCode: "RB",
+          transaction,
+        });
+        assert.equal(assigned.isSuccess, true);
+        throw new Error("rollback requested by integration test");
+      }),
+    /rollback requested by integration test/
+  );
+
+  const persisted = await findSeries(runtime, created.id);
+  assert.ok(persisted);
+  assert.equal(persisted.next_number, 200);
+  assert.equal(persisted.has_assigned_numbers, 0);
+});
diff --git a/apps/server/src/testing/http/proforma-creator.integration.test.ts b/apps/server/src/testing/http/proforma-creator.integration.test.ts
index 2ec9c9be..da3eeae7 100644
--- a/apps/server/src/testing/http/proforma-creator.integration.test.ts
+++ b/apps/server/src/testing/http/proforma-creator.integration.test.ts
@@ -1,4 +1,5 @@
 import assert from "node:assert/strict";
+import { randomUUID } from "node:crypto";
 import test from "node:test";
 
 import type { CatalogsPublicServicesType } from "@erp/catalogs/api";
@@ -32,6 +33,7 @@ import {
   buildProformaStatusChanger,
   buildProformaUpdater,
 } from "../../../../../modules/customer-invoices/src/api/application/proformas";
+import { ProformaTaxAvailabilityChecker } from "../../../../../modules/customer-invoices/src/api/application/proformas/services/proforma-tax-availability-checker";
 import {
   ProformaItemModel,
   ProformaModel,
@@ -208,7 +210,11 @@ function buildFailingAuditCollaborators(
     }),
     archiver: buildProformaArchiver({ repository: persistence.repository, audit }),
     deleter: buildProformaDeleter({ repository: persistence.repository, audit }),
-    statusChanger: buildProformaStatusChanger({ repository: persistence.repository, audit }),
+    statusChanger: buildProformaStatusChanger({
+      repository: persistence.repository,
+      taxAvailabilityChecker: new ProformaTaxAvailabilityChecker(taxDefinitions.finder),
+      audit,
+    }),
   };
 }
 
@@ -462,7 +468,7 @@ test("Duplicate revierte la copia y numeración si Audit falla en MariaDB", asyn
   });
   const useCase = buildDuplicateProformaByIdUseCase({
     duplicator,
-    finder: buildProformaFinder(repository),
+    finder: buildProformaFinder({ repository, taxResolver: catalogResolvers.taxResolver }),
     fullReadModelAssembler: buildProformaReadModelAssemblers({
       paymentMethodFinder: paymentMethods.finder,
       paymentTermFinder: paymentTerms.finder,
diff --git a/docs/document-series/README.md b/docs/document-series/README.md
index 952c93bc..ac85786e 100644
--- a/docs/document-series/README.md
+++ b/docs/document-series/README.md
@@ -15,11 +15,23 @@ Centraliza la gestion de series documentales y su numeracion transaccional para
 - `GET /document-series/:id`
 - `POST /document-series`
 - `PUT /document-series/:id`
+- `PATCH /document-series/:id/next-number`
+- `PATCH /document-series/:id/default`
+- `PATCH /document-series/:id/enable`
 - `PATCH /document-series/:id/disable`
 - `POST /document-series/assign-next`
 
 `POST /document-series/assign-next` es un endpoint operativo para casos de uso backend o integraciones controladas. No es un endpoint para que la UI previsualice numeración.
 
+## Administración segura
+
+- El update ordinario solo admite nombre, descripción, formato y vigencia.
+- Código, tipo documental y branch no se modifican tras crear la serie.
+- El contador solo puede avanzar con `PATCH /document-series/:id/next-number`; no admite decrementos, reseteos ni reutilización de números.
+- `has_assigned_numbers` registra la primera asignación confirmada, incluso cuando procede del endpoint operativo directo.
+- El default es opcional y exclusivo por empresa y tipo; se cambia con `PATCH /document-series/:id/default`.
+- Enable y disable son transiciones explícitas auditadas. Desactivar una serie default la deja sin default, sin seleccionar otra automáticamente.
+
 ## Consumo desde otros módulos
 
 `document-series:general` expone:
diff --git a/docs/document-series/document-series-design.md b/docs/document-series/document-series-design.md
index 785ad054..41e23bff 100644
--- a/docs/document-series/document-series-design.md
+++ b/docs/document-series/document-series-design.md
@@ -42,6 +42,11 @@ Separarlo introduciría doble escritura o lecturas no atómicas.
 - no asigna si la serie está fuera de vigencia
 - default por empresa + tipo, con prioridad de `branch_id` cuando aplica
 - formato de referencia: `prefix + padded(next_number) + suffix`
+- `code`, `documentType` y `branchId` quedan fijos tras crear la serie; branch continúa sin administración funcional.
+- La configuración ordinaria editable es `name`, `description`, `prefix`, `suffix`, `padding` y la vigencia. Los cambios de formato solo afectan futuras asignaciones.
+- `nextNumber` no se modifica mediante update: solo puede avanzarse estrictamente mediante una operación administrativa auditada.
+- Una serie registra `hasAssignedNumbers` al confirmar su primera asignación; la marca no se revierte salvo rollback de esa misma transacción.
+- El default es opcional, pero como máximo existe uno por empresa y tipo documental. Una serie inactiva no puede ser default; al desactivar un default se desmarca sin elegir sustituto.
 
 ## Concurrencia
 
@@ -91,6 +96,7 @@ El modelo ya contempla `branchId`, y la resolucion default da prioridad a `branc
 - sin reseteos anuales automáticos
 - sin reservas de numeración
 - sin huecos justificados
+- sin rename de código, cambio de tipo documental ni administración de branch
 - sin migración productiva automática de legacy
 
 ## Extensiones futuras
diff --git a/docs/document-series/manual-validation.md b/docs/document-series/manual-validation.md
index 69022df1..e6cd4c1a 100644
--- a/docs/document-series/manual-validation.md
+++ b/docs/document-series/manual-validation.md
@@ -54,6 +54,13 @@ Confirmar que `document-series` es la fuente operativa unica para series y numer
    - comprobar que los totales monetarios quedan a `0`
    - comprobar que `tax_config` queda persistido y se devuelve en `GET /proformas/:id`
 
+8. Administración de serie
+   - comprobar que una primera asignación marca `has_assigned_numbers` y que un rollback no conserva la marca;
+   - comprobar que `PATCH /document-series/:id/next-number` solo acepta un valor mayor;
+   - comprobar que marcar una inactiva como default falla;
+   - comprobar que desactivar una default la desmarca y no selecciona otra;
+   - comprobar que cambios de prefijo, sufijo o padding no alteran referencias ya persistidas.
+
 ## Pendiente conocido
 
 `branchId` aun no se propaga desde `customer-invoices` hasta `assignNextNumber(...)`. Toda la validacion de esta fase debe asumirse en alcance de empresa.
diff --git a/modules/companies/src/api/infrastructure/persistence/sequelize/models/sequelize-company.model.ts b/modules/companies/src/api/infrastructure/persistence/sequelize/models/sequelize-company.model.ts
index 500de1f4..149ade71 100644
--- a/modules/companies/src/api/infrastructure/persistence/sequelize/models/sequelize-company.model.ts
+++ b/modules/companies/src/api/infrastructure/persistence/sequelize/models/sequelize-company.model.ts
@@ -30,7 +30,7 @@ export class CompanyModel extends Model<
   declare status: string;
   declare created_at: Date;
   declare updated_at: Date;
-  declare deleted_at: Date;
+  declare deleted_at: Date | null;
 
   static associate(_database: Sequelize) {}
 
@@ -104,7 +104,8 @@ export default (database: Sequelize) => {
       },
       deleted_at: {
         type: DataTypes.DATE,
-        allowNull: false,
+        allowNull: true,
+        defaultValue: null,
       },
     },
     {
diff --git a/modules/customer-invoices/src/api/domain/proformas/aggregates/proforma.aggregate.ts b/modules/customer-invoices/src/api/domain/proformas/aggregates/proforma.aggregate.ts
index f622f83c..f7e5e7ba 100644
--- a/modules/customer-invoices/src/api/domain/proformas/aggregates/proforma.aggregate.ts
+++ b/modules/customer-invoices/src/api/domain/proformas/aggregates/proforma.aggregate.ts
@@ -53,7 +53,7 @@ export interface IProformaCreateProps {
   archivedAt: Maybe<UtcDate>;
 
   documentSeriesId: Maybe<UniqueID>; // ID de la serie de documentos para la proforma (si se asigna automáticamente)
-  proformaSeriesCode: Maybe<InvoiceSerie>; // Serie de proforma (p.e. "PF-")
+  proformaSeriesCode: Maybe<InvoiceSerie>; // Serie de proforma (p.e. "PF", "PF26", etc.)
   proformaNumber: Maybe<InvoiceNumber>; // Número de proforma (p.e. "65")
   proformaReference: InvoiceNumber; // Referencia de la proforma (serie + numero, p.e. "PF-0065")
 
diff --git a/modules/document-series/package.json b/modules/document-series/package.json
index 7f184fe5..a71d6fd5 100644
--- a/modules/document-series/package.json
+++ b/modules/document-series/package.json
@@ -26,6 +26,7 @@
     "@erp/core": "workspace:*",
     "@erp/identity": "workspace:*",
     "@repo/rdx-criteria": "workspace:*",
+    "@repo/rdx-audit": "workspace:*",
     "@repo/rdx-ddd": "workspace:*",
     "@repo/rdx-utils": "workspace:*",
     "express": "^4.22.1",
diff --git a/modules/document-series/src/api/application/commands/update-document-series.command.ts b/modules/document-series/src/api/application/commands/update-document-series.command.ts
index 02fdcec2..6f2dc945 100644
--- a/modules/document-series/src/api/application/commands/update-document-series.command.ts
+++ b/modules/document-series/src/api/application/commands/update-document-series.command.ts
@@ -1,17 +1,11 @@
 export type UpdateDocumentSeriesCommand = {
   companyId: string;
   id: string;
-  branchId?: string | null;
-  documentType?: string;
-  code?: string;
   name?: string;
   description?: string | null;
   prefix?: string | null;
   suffix?: string | null;
-  nextNumber?: number;
   padding?: number;
   validFrom?: string | null;
   validTo?: string | null;
-  isDefault?: boolean;
-  isActive?: boolean;
 };
diff --git a/modules/document-series/src/api/application/di/document-series-use-cases.di.ts b/modules/document-series/src/api/application/di/document-series-use-cases.di.ts
index ead28589..0cf993a8 100644
--- a/modules/document-series/src/api/application/di/document-series-use-cases.di.ts
+++ b/modules/document-series/src/api/application/di/document-series-use-cases.di.ts
@@ -2,17 +2,20 @@ import type { ITransactionManager } from "@erp/core/api";
 
 import { CreateDocumentSeriesCommandMapper, UpdateDocumentSeriesCommandMapper } from "../mappers";
 import type {
+  DocumentSeriesAdminService,
   DocumentSeriesFinder,
   DocumentSeriesNumberAssigner,
   DocumentSeriesWriter,
 } from "../services";
 import { DocumentSeriesSnapshotBuilder } from "../snapshot-builders";
 import {
+  AdvanceDocumentSeriesNumberUseCase,
   AssignNextDocumentNumberUseCase,
+  ChangeDocumentSeriesStatusUseCase,
   CreateDocumentSeriesUseCase,
-  DisableDocumentSeriesUseCase,
   GetDocumentSeriesByIdUseCase,
   ListDocumentSeriesUseCase,
+  SetDefaultDocumentSeriesUseCase,
   UpdateDocumentSeriesUseCase,
 } from "../use-cases";
 
@@ -20,6 +23,7 @@ export function buildDocumentSeriesUseCases(deps: {
   finder: DocumentSeriesFinder;
   writer: DocumentSeriesWriter;
   assigner: DocumentSeriesNumberAssigner;
+  admin: DocumentSeriesAdminService;
   transactionManager: ITransactionManager;
 }) {
   const snapshotBuilder = new DocumentSeriesSnapshotBuilder();
@@ -31,14 +35,14 @@ export function buildDocumentSeriesUseCases(deps: {
       new CreateDocumentSeriesUseCase({
         mapper: createMapper,
         writer: deps.writer,
+        admin: deps.admin,
         snapshotBuilder,
         transactionManager: deps.transactionManager,
       }),
     updateDocumentSeries: () =>
       new UpdateDocumentSeriesUseCase({
         mapper: updateMapper,
-        writer: deps.writer,
-        finder: deps.finder,
+        admin: deps.admin,
         snapshotBuilder,
         transactionManager: deps.transactionManager,
       }),
@@ -59,8 +63,27 @@ export function buildDocumentSeriesUseCases(deps: {
         snapshotBuilder,
       }),
     disableDocumentSeries: () =>
-      new DisableDocumentSeriesUseCase({
-        writer: deps.writer,
+      new ChangeDocumentSeriesStatusUseCase({
+        admin: deps.admin,
+        snapshotBuilder,
+        transactionManager: deps.transactionManager,
+      }),
+    enableDocumentSeries: () =>
+      new ChangeDocumentSeriesStatusUseCase({
+        admin: deps.admin,
+        snapshotBuilder,
+        transactionManager: deps.transactionManager,
+      }),
+    setDefaultDocumentSeries: () =>
+      new SetDefaultDocumentSeriesUseCase({
+        admin: deps.admin,
+        snapshotBuilder,
+        transactionManager: deps.transactionManager,
+      }),
+    advanceDocumentSeriesNumber: () =>
+      new AdvanceDocumentSeriesNumberUseCase({
+        admin: deps.admin,
+        snapshotBuilder,
         transactionManager: deps.transactionManager,
       }),
   };
diff --git a/modules/document-series/src/api/application/mappers/create-document-series-command.mapper.ts b/modules/document-series/src/api/application/mappers/create-document-series-command.mapper.ts
index 5d7d874a..16806cef 100644
--- a/modules/document-series/src/api/application/mappers/create-document-series-command.mapper.ts
+++ b/modules/document-series/src/api/application/mappers/create-document-series-command.mapper.ts
@@ -99,6 +99,7 @@ export class CreateDocumentSeriesCommandMapper {
         validTo: validTo ?? Maybe.none(),
         isDefault: command.isDefault,
         isActive: command.isActive,
+        hasAssignedNumbers: false,
         createdAt: new Date(),
         updatedAt: new Date(),
         deletedAt: Maybe.none(),
diff --git a/modules/document-series/src/api/application/mappers/update-document-series-command.mapper.ts b/modules/document-series/src/api/application/mappers/update-document-series-command.mapper.ts
index 209e0565..86b29ca2 100644
--- a/modules/document-series/src/api/application/mappers/update-document-series-command.mapper.ts
+++ b/modules/document-series/src/api/application/mappers/update-document-series-command.mapper.ts
@@ -11,7 +11,6 @@ import {
 import { Maybe, Result } from "@repo/rdx-utils";
 
 import type { UpdateDocumentSeriesRequestDTO } from "../../../common";
-import { DocumentSeriesCode, DocumentSeriesNumber, DocumentType } from "../../domain";
 import type { UpdateDocumentSeriesCommand } from "../commands";
 
 export class UpdateDocumentSeriesCommandMapper {
@@ -19,40 +18,19 @@ export class UpdateDocumentSeriesCommandMapper {
     return Result.ok<UpdateDocumentSeriesCommand>({
       companyId: companyId.toString(),
       id,
-      branchId: dto.branch_id,
-      documentType: dto.document_type,
-      code: dto.code,
       name: dto.name,
       description: dto.description,
       prefix: dto.prefix,
       suffix: dto.suffix,
-      nextNumber: dto.next_number,
       padding: dto.padding,
       validFrom: dto.valid_from,
       validTo: dto.valid_to,
-      isDefault: dto.is_default,
-      isActive: dto.is_active,
     });
   }
 
   public toPatch(command: UpdateDocumentSeriesCommand) {
     const errors: ValidationErrorDetail[] = [];
 
-    const branchId = extractOrPushError(
-      maybeFromNullableResult(command.branchId, (value) => UniqueID.create(value)),
-      "branchId",
-      errors
-    );
-    const documentType = extractOrPushError(
-      maybeFromNullableResult(command.documentType, (value) => DocumentType.create(value)),
-      "documentType",
-      errors
-    );
-    const code = extractOrPushError(
-      maybeFromNullableResult(command.code, (value) => DocumentSeriesCode.create(value)),
-      "code",
-      errors
-    );
     const name = extractOrPushError(
       maybeFromNullableResult(command.name, (value) => Name.create(value)),
       "name",
@@ -63,11 +41,6 @@ export class UpdateDocumentSeriesCommandMapper {
       "description",
       errors
     );
-    const nextNumber = extractOrPushError(
-      maybeFromNullableResult(command.nextNumber, (value) => DocumentSeriesNumber.create(value)),
-      "nextNumber",
-      errors
-    );
     const validFrom = extractOrPushError(
       maybeFromNullableResult(command.validFrom, (value) => UtcDate.createFromISO(value)),
       "validFrom",
@@ -86,12 +59,6 @@ export class UpdateDocumentSeriesCommandMapper {
     }
 
     return Result.ok({
-      branchId: command.branchId === undefined ? undefined : (branchId ?? Maybe.none<UniqueID>()),
-      documentType:
-        command.documentType === undefined
-          ? undefined
-          : (documentType ?? Maybe.none<DocumentType>()),
-      code: command.code === undefined ? undefined : (code ?? Maybe.none<DocumentSeriesCode>()),
       name: command.name === undefined ? undefined : (name ?? Maybe.none<Name>()),
       description:
         command.description === undefined ? undefined : (description ?? Maybe.none<TextValue>()),
@@ -99,15 +66,9 @@ export class UpdateDocumentSeriesCommandMapper {
         command.prefix === undefined ? undefined : Maybe.fromNullable(command.prefix ?? undefined),
       suffix:
         command.suffix === undefined ? undefined : Maybe.fromNullable(command.suffix ?? undefined),
-      nextNumber:
-        command.nextNumber === undefined
-          ? undefined
-          : (nextNumber ?? Maybe.none<DocumentSeriesNumber>()),
       padding: command.padding,
       validFrom: command.validFrom === undefined ? undefined : (validFrom ?? Maybe.none<UtcDate>()),
       validTo: command.validTo === undefined ? undefined : (validTo ?? Maybe.none<UtcDate>()),
-      isDefault: command.isDefault,
-      isActive: command.isActive,
       updatedAt: new Date(),
     });
   }
diff --git a/modules/document-series/src/api/application/repositories/document-series-repository.interface.ts b/modules/document-series/src/api/application/repositories/document-series-repository.interface.ts
index b11cb160..d0d4fba9 100644
--- a/modules/document-series/src/api/application/repositories/document-series-repository.interface.ts
+++ b/modules/document-series/src/api/application/repositories/document-series-repository.interface.ts
@@ -58,4 +58,9 @@ export interface IDocumentSeriesRepository {
   assignNextNumber(
     params: AssignNextNumberRepositoryParams
   ): Promise<Result<AssignedDocumentNumber, Error>>;
+  lockByCompanyAndDocumentType(
+    companyId: UniqueID,
+    documentType: DocumentType,
+    transaction: unknown
+  ): Promise<Result<void, Error>>;
 }
diff --git a/modules/document-series/src/api/application/services/document-series-admin.service.test.ts b/modules/document-series/src/api/application/services/document-series-admin.service.test.ts
new file mode 100644
index 00000000..c5bd991d
--- /dev/null
+++ b/modules/document-series/src/api/application/services/document-series-admin.service.test.ts
@@ -0,0 +1,161 @@
+import assert from "node:assert/strict";
+import test from "node:test";
+
+import { Name, UniqueID } from "@repo/rdx-ddd";
+import { Maybe, Result } from "@repo/rdx-utils";
+
+import {
+  DocumentSeries,
+  DocumentSeriesCode,
+  DocumentSeriesNumber,
+  DocumentType,
+} from "../../domain";
+
+import { DocumentSeriesAdminService } from "./document-series-admin.service";
+
+const makeSeries = (
+  companyId: UniqueID,
+  code: string,
+  type = DocumentType.proforma(),
+  active = true
+) =>
+  DocumentSeries.create({
+    companyId,
+    branchId: Maybe.none(),
+    documentType: type,
+    code: DocumentSeriesCode.create(code).data,
+    name: Name.create(code).data,
+    description: Maybe.none(),
+    prefix: Maybe.none(),
+    suffix: Maybe.none(),
+    nextNumber: DocumentSeriesNumber.create(100).data,
+    padding: 0,
+    validFrom: Maybe.none(),
+    validTo: Maybe.none(),
+    isDefault: false,
+    isActive: active,
+    hasAssignedNumbers: false,
+    createdAt: new Date(),
+    updatedAt: new Date(),
+    deletedAt: Maybe.none(),
+  }).data;
+
+const build = (...series: DocumentSeries[]) => {
+  const events: string[] = [];
+  const repository = {
+    getByIdInCompany: async (companyId: UniqueID, id: UniqueID) => {
+      const found = series.find((item) => item.id.equals(id) && item.companyId.equals(companyId));
+      return found ? Result.ok(found) : Result.fail(new Error("not found"));
+    },
+    save: async () => Result.ok(undefined),
+    lockByCompanyAndDocumentType: async () => Result.ok(undefined),
+    findDefaultInCompany: async ({
+      companyId,
+      documentType,
+    }: {
+      companyId: UniqueID;
+      documentType: DocumentType;
+    }) =>
+      Result.ok(
+        Maybe.fromNullable(
+          series.find(
+            (item) =>
+              item.companyId.equals(companyId) &&
+              item.documentType.equals(documentType) &&
+              item.isDefault
+          )
+        )
+      ),
+  };
+  const audit = {
+    recordMutation: async ({ action }: { action: string }) => {
+      events.push(action);
+      return Result.ok(undefined);
+    },
+  };
+  return { service: new DocumentSeriesAdminService(repository as never, audit as never), events };
+};
+
+test("advance persiste el contador, conserva la evidencia y audita", async () => {
+  const companyId = UniqueID.generateNewID();
+  const series = makeSeries(companyId, "PF");
+  const { service, events } = build(series);
+  const result = await service.advance({
+    companyId,
+    id: series.id,
+    nextNumber: DocumentSeriesNumber.create(150).data,
+    transaction: {},
+  });
+  assert.equal(result.isSuccess, true);
+  assert.equal(series.nextNumber.toPrimitive(), 150);
+  assert.equal(series.hasAssignedNumbers, false);
+  assert.deepEqual(events, ["document_series.number_advanced"]);
+  assert.equal(
+    (
+      await service.advance({
+        companyId,
+        id: series.id,
+        nextNumber: DocumentSeriesNumber.create(150).data,
+        transaction: {},
+      })
+    ).isFailure,
+    true
+  );
+});
+
+test("setDefault sustituye únicamente el default del mismo tenant y tipo", async () => {
+  const companyA = UniqueID.generateNewID();
+  const companyB = UniqueID.generateNewID();
+  const first = makeSeries(companyA, "A");
+  first.markAsDefault();
+  const second = makeSeries(companyA, "B");
+  const invoice = makeSeries(companyA, "F", DocumentType.issuedInvoice());
+  invoice.markAsDefault();
+  const foreign = makeSeries(companyB, "X");
+  foreign.markAsDefault();
+  const { service, events } = build(first, second, invoice, foreign);
+  const result = await service.setDefault({ companyId: companyA, id: second.id, transaction: {} });
+  assert.equal(result.isSuccess, true);
+  assert.equal(first.isDefault, false);
+  assert.equal(second.isDefault, true);
+  assert.equal(invoice.isDefault, true);
+  assert.equal(foreign.isDefault, true);
+  assert.deepEqual(events, ["document_series.default_unset", "document_series.default_set"]);
+});
+
+test("rechaza default inactivo y aísla series de otro tenant", async () => {
+  const companyA = UniqueID.generateNewID();
+  const companyB = UniqueID.generateNewID();
+  const inactive = makeSeries(companyA, "I", DocumentType.proforma(), false);
+  const foreign = makeSeries(companyB, "X");
+  const { service } = build(inactive, foreign);
+  assert.equal(
+    (await service.setDefault({ companyId: companyA, id: inactive.id, transaction: {} })).isFailure,
+    true
+  );
+  assert.equal(
+    (
+      await service.advance({
+        companyId: companyA,
+        id: foreign.id,
+        nextNumber: DocumentSeriesNumber.create(101).data,
+        transaction: {},
+      })
+    ).isFailure,
+    true
+  );
+});
+
+test("disable desmarca default y enable no lo recupera", async () => {
+  const companyId = UniqueID.generateNewID();
+  const series = makeSeries(companyId, "PF");
+  series.markAsDefault();
+  const { service, events } = build(series);
+  await service.changeStatus({ companyId, id: series.id, action: "disable", transaction: {} });
+  assert.equal(series.isActive, false);
+  assert.equal(series.isDefault, false);
+  await service.changeStatus({ companyId, id: series.id, action: "enable", transaction: {} });
+  assert.equal(series.isActive, true);
+  assert.equal(series.isDefault, false);
+  assert.deepEqual(events, ["document_series.disabled", "document_series.enabled"]);
+});
diff --git a/modules/document-series/src/api/application/services/document-series-admin.service.ts b/modules/document-series/src/api/application/services/document-series-admin.service.ts
new file mode 100644
index 00000000..94fc1d28
--- /dev/null
+++ b/modules/document-series/src/api/application/services/document-series-admin.service.ts
@@ -0,0 +1,211 @@
+import type { IAudit } from "@repo/rdx-audit";
+import type { UniqueID } from "@repo/rdx-ddd";
+import { Result } from "@repo/rdx-utils";
+
+import type { DocumentSeries, DocumentSeriesNumber } from "../../domain";
+import type { IDocumentSeriesRepository } from "../repositories";
+
+const toAuditTarget = (series: DocumentSeries) => ({
+  type: "document_series",
+  id: series.id.toString(),
+  label: series.code.toPrimitive(),
+});
+
+const toAuditState = (series: DocumentSeries) => ({
+  name: series.name.toPrimitive(),
+  description: series.description.getOrUndefined()?.toPrimitive() ?? null,
+  prefix: series.prefix.getOrUndefined() ?? null,
+  suffix: series.suffix.getOrUndefined() ?? null,
+  padding: series.padding,
+  validFrom: series.validFrom.getOrUndefined()?.toPrimitive() ?? null,
+  validTo: series.validTo.getOrUndefined()?.toPrimitive() ?? null,
+  nextNumber: series.nextNumber.toPrimitive(),
+  isDefault: series.isDefault,
+  isActive: series.isActive,
+  hasAssignedNumbers: series.hasAssignedNumbers,
+});
+
+export class DocumentSeriesAdminService {
+  public constructor(
+    private readonly repository: IDocumentSeriesRepository,
+    private readonly audit: IAudit
+  ) {}
+
+  public async updateConfiguration(params: {
+    companyId: UniqueID;
+    id: UniqueID;
+    patch: Parameters<DocumentSeries["update"]>[0];
+    transaction: unknown;
+  }) {
+    const found = await this.repository.getByIdInCompany(
+      params.companyId,
+      params.id,
+      params.transaction
+    );
+    if (found.isFailure) {
+      return Result.fail(found.error);
+    }
+    const before = toAuditState(found.data);
+    const changed = found.data.update(params.patch);
+    if (changed.isFailure) {
+      return Result.fail(changed.error);
+    }
+    const saved = await this.repository.save(found.data, params.transaction);
+    if (saved.isFailure) {
+      return Result.fail(saved.error);
+    }
+    const audited = await this.audit.recordMutation({
+      action: "document_series.configuration_updated",
+      target: toAuditTarget(found.data),
+      before,
+      after: toAuditState(found.data),
+    });
+    return audited.isFailure ? Result.fail(audited.error) : Result.ok(found.data);
+  }
+
+  public async advance(params: {
+    companyId: UniqueID;
+    id: UniqueID;
+    nextNumber: DocumentSeriesNumber;
+    transaction: unknown;
+  }) {
+    const found = await this.repository.getByIdInCompany(
+      params.companyId,
+      params.id,
+      params.transaction
+    );
+    if (found.isFailure) {
+      return Result.fail(found.error);
+    }
+    const before = toAuditState(found.data);
+    const changed = found.data.advanceNextNumber(params.nextNumber);
+    if (changed.isFailure) {
+      return Result.fail(changed.error);
+    }
+    const saved = await this.repository.save(found.data, params.transaction);
+    if (saved.isFailure) {
+      return Result.fail(saved.error);
+    }
+    const audited = await this.audit.recordMutation({
+      action: "document_series.number_advanced",
+      target: toAuditTarget(found.data),
+      before,
+      after: toAuditState(found.data),
+    });
+    return audited.isFailure ? Result.fail(audited.error) : Result.ok(found.data);
+  }
+
+  public async setDefault(params: { companyId: UniqueID; id: UniqueID; transaction: unknown }) {
+    const targetResult = await this.repository.getByIdInCompany(
+      params.companyId,
+      params.id,
+      params.transaction
+    );
+    if (targetResult.isFailure) {
+      return Result.fail(targetResult.error);
+    }
+    const target = targetResult.data;
+    const lock = await this.repository.lockByCompanyAndDocumentType(
+      params.companyId,
+      target.documentType,
+      params.transaction
+    );
+    if (lock.isFailure) {
+      return Result.fail(lock.error);
+    }
+    const lockedTargetResult = await this.repository.getByIdInCompany(
+      params.companyId,
+      params.id,
+      params.transaction
+    );
+    if (lockedTargetResult.isFailure) {
+      return Result.fail(lockedTargetResult.error);
+    }
+    const lockedTarget = lockedTargetResult.data;
+    if (!lockedTarget.isActive) {
+      const marked = lockedTarget.markAsDefault();
+      return marked.isFailure ? Result.fail(marked.error) : Result.ok(lockedTarget);
+    }
+    const currentResult = await this.repository.findDefaultInCompany({
+      companyId: params.companyId,
+      branchId: null,
+      documentType: lockedTarget.documentType,
+      transaction: params.transaction,
+    });
+    if (currentResult.isFailure) {
+      return Result.fail(currentResult.error);
+    }
+    const current = currentResult.data.getOrUndefined();
+    if (current && current.id.toString() !== lockedTarget.id.toString()) {
+      const unset = await this.unsetDefault(current, params.transaction);
+      if (unset.isFailure) {
+        return Result.fail(unset.error);
+      }
+    }
+    const before = toAuditState(lockedTarget);
+    const marked = lockedTarget.markAsDefault();
+    if (marked.isFailure) {
+      return Result.fail(marked.error);
+    }
+    const saved = await this.repository.save(lockedTarget, params.transaction);
+    if (saved.isFailure) {
+      return Result.fail(saved.error);
+    }
+    const audited = await this.audit.recordMutation({
+      action: "document_series.default_set",
+      target: toAuditTarget(lockedTarget),
+      before,
+      after: toAuditState(lockedTarget),
+    });
+    return audited.isFailure ? Result.fail(audited.error) : Result.ok(lockedTarget);
+  }
+
+  private async unsetDefault(series: DocumentSeries, transaction: unknown) {
+    const before = toAuditState(series);
+    series.unmarkAsDefault();
+    const saved = await this.repository.save(series, transaction);
+    if (saved.isFailure) {
+      return Result.fail(saved.error);
+    }
+    return this.audit.recordMutation({
+      action: "document_series.default_unset",
+      target: toAuditTarget(series),
+      before,
+      after: toAuditState(series),
+    });
+  }
+
+  public async changeStatus(params: {
+    companyId: UniqueID;
+    id: UniqueID;
+    action: "enable" | "disable";
+    transaction: unknown;
+  }) {
+    const found = await this.repository.getByIdInCompany(
+      params.companyId,
+      params.id,
+      params.transaction
+    );
+    if (found.isFailure) {
+      return Result.fail(found.error);
+    }
+    const series = found.data;
+    const before = toAuditState(series);
+    if (params.action === "enable") {
+      series.enable();
+    } else {
+      series.disable();
+    }
+    const saved = await this.repository.save(series, params.transaction);
+    if (saved.isFailure) {
+      return Result.fail(saved.error);
+    }
+    const audited = await this.audit.recordMutation({
+      action: params.action === "enable" ? "document_series.enabled" : "document_series.disabled",
+      target: toAuditTarget(series),
+      before,
+      after: toAuditState(series),
+    });
+    return audited.isFailure ? Result.fail(audited.error) : Result.ok(series);
+  }
+}
diff --git a/modules/document-series/src/api/application/services/index.ts b/modules/document-series/src/api/application/services/index.ts
index c8770e9f..4ae59fd0 100644
--- a/modules/document-series/src/api/application/services/index.ts
+++ b/modules/document-series/src/api/application/services/index.ts
@@ -1,3 +1,4 @@
 export * from "./document-series-finder";
+export * from "./document-series-admin.service";
 export * from "./document-series-number-assigner";
 export * from "./document-series-writer";
diff --git a/modules/document-series/src/api/application/snapshot-builders/document-series.snapshot-builder.ts b/modules/document-series/src/api/application/snapshot-builders/document-series.snapshot-builder.ts
index c7fc6950..1139dd32 100644
--- a/modules/document-series/src/api/application/snapshot-builders/document-series.snapshot-builder.ts
+++ b/modules/document-series/src/api/application/snapshot-builders/document-series.snapshot-builder.ts
@@ -26,6 +26,7 @@ export class DocumentSeriesSnapshotBuilder {
       valid_to: documentSeries.validTo.getOrUndefined()?.toPrimitive() ?? null,
       is_default: documentSeries.isDefault,
       is_active: documentSeries.isActive,
+      has_assigned_numbers: documentSeries.hasAssignedNumbers,
       created_at: documentSeries.createdAt.toISOString(),
       updated_at: documentSeries.updatedAt.toISOString(),
       deleted_at: documentSeries.deletedAt.getOrUndefined()?.toISOString() ?? null,
diff --git a/modules/document-series/src/api/application/use-cases/advance-document-series-number.use-case.ts b/modules/document-series/src/api/application/use-cases/advance-document-series-number.use-case.ts
new file mode 100644
index 00000000..db8e1081
--- /dev/null
+++ b/modules/document-series/src/api/application/use-cases/advance-document-series-number.use-case.ts
@@ -0,0 +1,38 @@
+import type { ITransactionManager } from "@erp/core/api";
+import { UniqueID } from "@repo/rdx-ddd";
+import { Result } from "@repo/rdx-utils";
+
+import type { DocumentSeriesNumber } from "../../domain";
+import type { DocumentSeriesAdminService } from "../services";
+import type { DocumentSeriesSnapshotBuilder } from "../snapshot-builders";
+
+export class AdvanceDocumentSeriesNumberUseCase {
+  public constructor(
+    private readonly deps: {
+      admin: DocumentSeriesAdminService;
+      snapshotBuilder: DocumentSeriesSnapshotBuilder;
+      transactionManager: ITransactionManager;
+    }
+  ) {}
+  public execute(params: { companyId: string; id: string; nextNumber: DocumentSeriesNumber }) {
+    const companyId = UniqueID.create(params.companyId);
+    const id = UniqueID.create(params.id);
+    if (companyId.isFailure) {
+      return Result.fail(companyId.error);
+    }
+    if (id.isFailure) {
+      return Result.fail(id.error);
+    }
+    return this.deps.transactionManager.complete(async (transaction: unknown) => {
+      const result = await this.deps.admin.advance({
+        companyId: companyId.data,
+        id: id.data,
+        nextNumber: params.nextNumber,
+        transaction,
+      });
+      return result.isFailure
+        ? Result.fail(result.error)
+        : Result.ok(this.deps.snapshotBuilder.toResponse(result.data));
+    });
+  }
+}
diff --git a/modules/document-series/src/api/application/use-cases/change-document-series-status.use-case.ts b/modules/document-series/src/api/application/use-cases/change-document-series-status.use-case.ts
new file mode 100644
index 00000000..4c1297c1
--- /dev/null
+++ b/modules/document-series/src/api/application/use-cases/change-document-series-status.use-case.ts
@@ -0,0 +1,37 @@
+import type { ITransactionManager } from "@erp/core/api";
+import { UniqueID } from "@repo/rdx-ddd";
+import { Result } from "@repo/rdx-utils";
+
+import type { DocumentSeriesAdminService } from "../services";
+import type { DocumentSeriesSnapshotBuilder } from "../snapshot-builders";
+
+export class ChangeDocumentSeriesStatusUseCase {
+  public constructor(
+    private readonly deps: {
+      admin: DocumentSeriesAdminService;
+      snapshotBuilder: DocumentSeriesSnapshotBuilder;
+      transactionManager: ITransactionManager;
+    }
+  ) {}
+  public execute(params: { companyId: string; id: string; action: "enable" | "disable" }) {
+    const companyId = UniqueID.create(params.companyId);
+    const id = UniqueID.create(params.id);
+    if (companyId.isFailure) {
+      return Result.fail(companyId.error);
+    }
+    if (id.isFailure) {
+      return Result.fail(id.error);
+    }
+    return this.deps.transactionManager.complete(async (transaction: unknown) => {
+      const result = await this.deps.admin.changeStatus({
+        companyId: companyId.data,
+        id: id.data,
+        action: params.action,
+        transaction,
+      });
+      return result.isFailure
+        ? Result.fail(result.error)
+        : Result.ok(this.deps.snapshotBuilder.toResponse(result.data));
+    });
+  }
+}
diff --git a/modules/document-series/src/api/application/use-cases/create-document-series.use-case.ts b/modules/document-series/src/api/application/use-cases/create-document-series.use-case.ts
index aca160d7..52d97fc4 100644
--- a/modules/document-series/src/api/application/use-cases/create-document-series.use-case.ts
+++ b/modules/document-series/src/api/application/use-cases/create-document-series.use-case.ts
@@ -4,7 +4,7 @@ import { Result } from "@repo/rdx-utils";
 
 import type { CreateDocumentSeriesRequestDTO } from "../../../common";
 import type { CreateDocumentSeriesCommandMapper } from "../mappers";
-import type { DocumentSeriesWriter } from "../services";
+import type { DocumentSeriesAdminService, DocumentSeriesWriter } from "../services";
 import type { DocumentSeriesSnapshotBuilder } from "../snapshot-builders";
 
 export class CreateDocumentSeriesUseCase {
@@ -12,6 +12,7 @@ export class CreateDocumentSeriesUseCase {
     private readonly deps: {
       mapper: CreateDocumentSeriesCommandMapper;
       writer: DocumentSeriesWriter;
+      admin: DocumentSeriesAdminService;
       snapshotBuilder: DocumentSeriesSnapshotBuilder;
       transactionManager: ITransactionManager;
     }
@@ -25,12 +26,29 @@ export class CreateDocumentSeriesUseCase {
         return Result.fail(aggregateResult.error);
       }
 
+      const shouldSetDefault = aggregateResult.data.isDefault;
+      if (shouldSetDefault) {
+        aggregateResult.data.unmarkAsDefault();
+      }
+
       const createResult = await this.deps.writer.create(aggregateResult.data, transaction);
 
       if (createResult.isFailure) {
         return Result.fail(createResult.error);
       }
 
+      if (shouldSetDefault) {
+        const defaultResult = await this.deps.admin.setDefault({
+          companyId: params.companyId,
+          id: aggregateResult.data.id,
+          transaction,
+        });
+        if (defaultResult.isFailure) {
+          return Result.fail(defaultResult.error);
+        }
+        return Result.ok(this.deps.snapshotBuilder.toResponse(defaultResult.data));
+      }
+
       return Result.ok(this.deps.snapshotBuilder.toResponse(aggregateResult.data));
     });
   }
diff --git a/modules/document-series/src/api/application/use-cases/index.ts b/modules/document-series/src/api/application/use-cases/index.ts
index 4ad2f195..cfc1c81f 100644
--- a/modules/document-series/src/api/application/use-cases/index.ts
+++ b/modules/document-series/src/api/application/use-cases/index.ts
@@ -1,6 +1,9 @@
 export * from "./assign-next-document-number.use-case";
+export * from "./advance-document-series-number.use-case";
+export * from "./change-document-series-status.use-case";
 export * from "./create-document-series.use-case";
 export * from "./disable-document-series.use-case";
 export * from "./get-document-series-by-id.use-case";
 export * from "./list-document-series.use-case";
+export * from "./set-default-document-series.use-case";
 export * from "./update-document-series.use-case";
diff --git a/modules/document-series/src/api/application/use-cases/set-default-document-series.use-case.ts b/modules/document-series/src/api/application/use-cases/set-default-document-series.use-case.ts
new file mode 100644
index 00000000..3f47c6fc
--- /dev/null
+++ b/modules/document-series/src/api/application/use-cases/set-default-document-series.use-case.ts
@@ -0,0 +1,36 @@
+import type { ITransactionManager } from "@erp/core/api";
+import { UniqueID } from "@repo/rdx-ddd";
+import { Result } from "@repo/rdx-utils";
+
+import type { DocumentSeriesAdminService } from "../services";
+import type { DocumentSeriesSnapshotBuilder } from "../snapshot-builders";
+
+export class SetDefaultDocumentSeriesUseCase {
+  public constructor(
+    private readonly deps: {
+      admin: DocumentSeriesAdminService;
+      snapshotBuilder: DocumentSeriesSnapshotBuilder;
+      transactionManager: ITransactionManager;
+    }
+  ) {}
+  public execute(params: { companyId: string; id: string }) {
+    const companyId = UniqueID.create(params.companyId);
+    const id = UniqueID.create(params.id);
+    if (companyId.isFailure) {
+      return Result.fail(companyId.error);
+    }
+    if (id.isFailure) {
+      return Result.fail(id.error);
+    }
+    return this.deps.transactionManager.complete(async (transaction: unknown) => {
+      const result = await this.deps.admin.setDefault({
+        companyId: companyId.data,
+        id: id.data,
+        transaction,
+      });
+      return result.isFailure
+        ? Result.fail(result.error)
+        : Result.ok(this.deps.snapshotBuilder.toResponse(result.data));
+    });
+  }
+}
diff --git a/modules/document-series/src/api/application/use-cases/update-document-series.use-case.ts b/modules/document-series/src/api/application/use-cases/update-document-series.use-case.ts
index 9af2b261..7ddedcbf 100644
--- a/modules/document-series/src/api/application/use-cases/update-document-series.use-case.ts
+++ b/modules/document-series/src/api/application/use-cases/update-document-series.use-case.ts
@@ -4,15 +4,14 @@ import { Result } from "@repo/rdx-utils";
 
 import type { UpdateDocumentSeriesRequestDTO } from "../../../common";
 import type { UpdateDocumentSeriesCommandMapper } from "../mappers";
-import type { DocumentSeriesFinder, DocumentSeriesWriter } from "../services";
+import type { DocumentSeriesAdminService } from "../services";
 import type { DocumentSeriesSnapshotBuilder } from "../snapshot-builders";
 
 export class UpdateDocumentSeriesUseCase {
   public constructor(
     private readonly deps: {
       mapper: UpdateDocumentSeriesCommandMapper;
-      writer: DocumentSeriesWriter;
-      finder: DocumentSeriesFinder;
+      admin: DocumentSeriesAdminService;
       snapshotBuilder: DocumentSeriesSnapshotBuilder;
       transactionManager: ITransactionManager;
     }
@@ -40,83 +39,26 @@ export class UpdateDocumentSeriesUseCase {
     }
 
     return this.deps.transactionManager.complete(async (transaction: unknown) => {
-      const updateResult = await this.deps.writer.update(
-        companyIdResult.data,
-        idResult.data,
-        {
-          branchId:
-            patchResult.data.branchId === undefined
-              ? undefined
-              : patchResult.data.branchId.getOrUndefined()
-                ? patchResult.data.branchId
-                : patchResult.data.branchId,
-          documentType:
-            patchResult.data.documentType === undefined
-              ? undefined
-              : patchResult.data.documentType.getOrUndefined()
-                ? patchResult.data.documentType.unwrap()
-                : patchResult.data.documentType,
-          code:
-            patchResult.data.code === undefined
-              ? undefined
-              : patchResult.data.code.getOrUndefined()
-                ? patchResult.data.code.unwrap()
-                : patchResult.data.code,
-          name:
-            patchResult.data.name === undefined
-              ? undefined
-              : patchResult.data.name.getOrUndefined()
-                ? patchResult.data.name.unwrap()
-                : patchResult.data.name,
-          description:
-            patchResult.data.description === undefined
-              ? undefined
-              : patchResult.data.description.getOrUndefined()
-                ? patchResult.data.description.unwrap()
-                : patchResult.data.description,
+      const updateResult = await this.deps.admin.updateConfiguration({
+        companyId: companyIdResult.data,
+        id: idResult.data,
+        patch: {
+          name: patchResult.data.name?.getOrUndefined(),
+          description: patchResult.data.description,
           prefix: patchResult.data.prefix,
           suffix: patchResult.data.suffix,
-          nextNumber:
-            patchResult.data.nextNumber === undefined
-              ? undefined
-              : patchResult.data.nextNumber.getOrUndefined()
-                ? patchResult.data.nextNumber.unwrap()
-                : patchResult.data.nextNumber,
           padding: patchResult.data.padding,
-          validFrom:
-            patchResult.data.validFrom === undefined
-              ? undefined
-              : patchResult.data.validFrom.getOrUndefined()
-                ? patchResult.data.validFrom.unwrap()
-                : patchResult.data.validFrom,
-          validTo:
-            patchResult.data.validTo === undefined
-              ? undefined
-              : patchResult.data.validTo.getOrUndefined()
-                ? patchResult.data.validTo.unwrap()
-                : patchResult.data.validTo,
-          isDefault: patchResult.data.isDefault,
-          isActive: patchResult.data.isActive,
-          updatedAt: patchResult.data.updatedAt,
+          validFrom: patchResult.data.validFrom,
+          validTo: patchResult.data.validTo,
         },
-        transaction
-      );
+        transaction,
+      });
 
       if (updateResult.isFailure) {
         return Result.fail(updateResult.error);
       }
 
-      const getResult = await this.deps.finder.findById(
-        companyIdResult.data,
-        idResult.data,
-        transaction
-      );
-
-      if (getResult.isFailure) {
-        return Result.fail(getResult.error);
-      }
-
-      return Result.ok(this.deps.snapshotBuilder.toResponse(getResult.data));
+      return Result.ok(this.deps.snapshotBuilder.toResponse(updateResult.data));
     });
   }
 }
diff --git a/modules/document-series/src/api/domain/aggregates/document-series.aggregate.test.ts b/modules/document-series/src/api/domain/aggregates/document-series.aggregate.test.ts
new file mode 100644
index 00000000..7fcef7e2
--- /dev/null
+++ b/modules/document-series/src/api/domain/aggregates/document-series.aggregate.test.ts
@@ -0,0 +1,81 @@
+import assert from "node:assert/strict";
+import test from "node:test";
+
+import { Name, TextValue, UniqueID, UtcDate } from "@repo/rdx-ddd";
+import { Maybe } from "@repo/rdx-utils";
+
+import { DocumentSeriesCode, DocumentSeriesNumber, DocumentType } from "../value-objects";
+
+import { DocumentSeries } from "./document-series.aggregate";
+
+const createSeries = (params?: {
+  nextNumber?: number;
+  prefix?: string;
+  suffix?: string;
+  padding?: number;
+}) => {
+  const result = DocumentSeries.create({
+    companyId: UniqueID.generateNewID(),
+    branchId: Maybe.none(),
+    documentType: DocumentType.proforma(),
+    code: DocumentSeriesCode.create("PF").data,
+    name: Name.create("Proformas").data,
+    description: Maybe.none(),
+    prefix: params?.prefix ? Maybe.some(params.prefix) : Maybe.none(),
+    suffix: params?.suffix ? Maybe.some(params.suffix) : Maybe.none(),
+    nextNumber: DocumentSeriesNumber.create(params?.nextNumber ?? 1).data,
+    padding: params?.padding ?? 4,
+    validFrom: Maybe.none(),
+    validTo: Maybe.none(),
+    isDefault: false,
+    isActive: true,
+    hasAssignedNumbers: false,
+    createdAt: new Date(),
+    updatedAt: new Date(),
+    deletedAt: Maybe.none(),
+  });
+  assert.equal(result.isSuccess, true);
+  return result.data;
+};
+
+test("crea una serie sin números asignados y marca la primera asignación", () => {
+  const series = createSeries({ nextNumber: 42, prefix: "PF-", suffix: "-X", padding: 5 });
+  assert.equal(series.hasAssignedNumbers, false);
+  const first = series.assignNext(UtcDate.createFromISO("2026-09-18").data);
+  assert.equal(first.isSuccess, true);
+  assert.deepEqual(first.data, {
+    seriesId: series.id.toString(),
+    seriesCode: "PF",
+    number: "42",
+    reference: "PF-00042-X",
+  });
+  assert.equal(series.nextNumber.toPrimitive(), 43);
+  assert.equal(series.hasAssignedNumbers, true);
+  assert.equal(series.assignNext(UtcDate.createFromISO("2026-09-18").data).isSuccess, true);
+  assert.equal(series.hasAssignedNumbers, true);
+});
+
+test("permite actualizar formato tras haber asignado números", () => {
+  const series = createSeries();
+  series.assignNext(UtcDate.createFromISO("2026-09-18").data);
+  const result = series.update({
+    prefix: Maybe.some("N-"),
+    suffix: Maybe.some("-2026"),
+    padding: 6,
+    description: Maybe.some(TextValue.create("Nueva configuración").data),
+  });
+  assert.equal(result.isSuccess, true);
+  assert.equal(series.formatReference(DocumentSeriesNumber.create(2).data), "N-000002-2026");
+});
+
+test("mantiene transición de estado y contador estrictamente creciente", () => {
+  const series = createSeries({ nextNumber: 100 });
+  series.disable();
+  assert.equal(series.isActive, false);
+  series.enable();
+  assert.equal(series.isActive, true);
+  assert.equal(series.advanceNextNumber(DocumentSeriesNumber.create(100).data).isFailure, true);
+  assert.equal(series.advanceNextNumber(DocumentSeriesNumber.create(99).data).isFailure, true);
+  assert.equal(series.advanceNextNumber(DocumentSeriesNumber.create(150).data).isSuccess, true);
+  assert.equal(series.nextNumber.toPrimitive(), 150);
+});
diff --git a/modules/document-series/src/api/domain/aggregates/document-series.aggregate.ts b/modules/document-series/src/api/domain/aggregates/document-series.aggregate.ts
index d115fe1e..ffaaf7f8 100644
--- a/modules/document-series/src/api/domain/aggregates/document-series.aggregate.ts
+++ b/modules/document-series/src/api/domain/aggregates/document-series.aggregate.ts
@@ -7,7 +7,12 @@ import {
 } from "@repo/rdx-ddd";
 import { type Maybe, Result } from "@repo/rdx-utils";
 
-import { DocumentSeriesInactiveError, DocumentSeriesOutOfValidityError } from "../errors";
+import {
+  DocumentSeriesInactiveDefaultError,
+  DocumentSeriesInactiveError,
+  DocumentSeriesNumberMustAdvanceError,
+  DocumentSeriesOutOfValidityError,
+} from "../errors";
 import type {
   AssignedDocumentNumber,
   DocumentSeriesCode,
@@ -30,6 +35,7 @@ export type DocumentSeriesCreateProps = {
   validTo: Maybe<UtcDate>;
   isDefault: boolean;
   isActive: boolean;
+  hasAssignedNumbers: boolean;
   createdAt: Date;
   updatedAt: Date;
   deletedAt: Maybe<Date>;
@@ -49,6 +55,10 @@ export class DocumentSeries extends AggregateRoot<DocumentSeriesInternalProps> {
       );
     }
 
+    if (props.isDefault && !props.isActive) {
+      return Result.fail(new DocumentSeriesInactiveDefaultError());
+    }
+
     if (
       props.validFrom.isSome() &&
       props.validTo.isSome() &&
@@ -122,6 +132,10 @@ export class DocumentSeries extends AggregateRoot<DocumentSeriesInternalProps> {
     return this.props.isActive;
   }
 
+  public get hasAssignedNumbers() {
+    return this.props.hasAssignedNumbers;
+  }
+
   public get createdAt() {
     return this.props.createdAt;
   }
@@ -134,7 +148,14 @@ export class DocumentSeries extends AggregateRoot<DocumentSeriesInternalProps> {
     return this.props.deletedAt;
   }
 
-  public update(props: Partial<Omit<DocumentSeriesCreateProps, "companyId" | "createdAt">>) {
+  public update(
+    props: Partial<
+      Pick<
+        DocumentSeriesCreateProps,
+        "name" | "description" | "prefix" | "suffix" | "padding" | "validFrom" | "validTo"
+      >
+    >
+  ) {
     const nextValidFrom = props.validFrom ?? this.props.validFrom;
     const nextValidTo = props.validTo ?? this.props.validTo;
 
@@ -148,29 +169,52 @@ export class DocumentSeries extends AggregateRoot<DocumentSeriesInternalProps> {
       );
     }
 
-    this.props.branchId = props.branchId ?? this.props.branchId;
-    this.props.documentType = props.documentType ?? this.props.documentType;
-    this.props.code = props.code ?? this.props.code;
     this.props.name = props.name ?? this.props.name;
     this.props.description = props.description ?? this.props.description;
     this.props.prefix = props.prefix ?? this.props.prefix;
     this.props.suffix = props.suffix ?? this.props.suffix;
-    this.props.nextNumber = props.nextNumber ?? this.props.nextNumber;
     this.props.padding = props.padding ?? this.props.padding;
     this.props.validFrom = nextValidFrom;
     this.props.validTo = nextValidTo;
-    this.props.isDefault = props.isDefault ?? this.props.isDefault;
-    this.props.isActive = props.isActive ?? this.props.isActive;
-    this.props.updatedAt = props.updatedAt ?? new Date();
+    this.props.updatedAt = new Date();
 
     return Result.ok();
   }
 
   public disable(updatedAt = new Date()) {
     this.props.isActive = false;
+    this.props.isDefault = false;
     this.props.updatedAt = updatedAt;
   }
 
+  public enable(updatedAt = new Date()) {
+    this.props.isActive = true;
+    this.props.updatedAt = updatedAt;
+  }
+
+  public markAsDefault(updatedAt = new Date()) {
+    if (!this.props.isActive) {
+      return Result.fail(new DocumentSeriesInactiveDefaultError());
+    }
+    this.props.isDefault = true;
+    this.props.updatedAt = updatedAt;
+    return Result.ok();
+  }
+
+  public unmarkAsDefault(updatedAt = new Date()) {
+    this.props.isDefault = false;
+    this.props.updatedAt = updatedAt;
+  }
+
+  public advanceNextNumber(nextNumber: DocumentSeriesNumber, updatedAt = new Date()) {
+    if (nextNumber.toPrimitive() <= this.props.nextNumber.toPrimitive()) {
+      return Result.fail(new DocumentSeriesNumberMustAdvanceError());
+    }
+    this.props.nextNumber = nextNumber;
+    this.props.updatedAt = updatedAt;
+    return Result.ok();
+  }
+
   public ensureCanAssign(currentDate: UtcDate) {
     if (!this.props.isActive) {
       return Result.fail(new DocumentSeriesInactiveError(this.code.toPrimitive()));
@@ -210,6 +254,7 @@ export class DocumentSeries extends AggregateRoot<DocumentSeriesInternalProps> {
     }
 
     this.props.nextNumber = nextNumberResult.data;
+    this.props.hasAssignedNumbers = true;
     this.props.updatedAt = new Date();
 
     return Result.ok({
diff --git a/modules/document-series/src/api/domain/errors/document-series-inactive-default.error.ts b/modules/document-series/src/api/domain/errors/document-series-inactive-default.error.ts
new file mode 100644
index 00000000..1623a154
--- /dev/null
+++ b/modules/document-series/src/api/domain/errors/document-series-inactive-default.error.ts
@@ -0,0 +1,11 @@
+export class DocumentSeriesInactiveDefaultError extends Error {
+  public constructor() {
+    super("An inactive document series cannot be marked as default.");
+    this.name = "DocumentSeriesInactiveDefaultError";
+  }
+}
+
+export const isDocumentSeriesInactiveDefaultError = (
+  error: unknown
+): error is DocumentSeriesInactiveDefaultError =>
+  error instanceof DocumentSeriesInactiveDefaultError;
diff --git a/modules/document-series/src/api/domain/errors/document-series-number-must-advance.error.ts b/modules/document-series/src/api/domain/errors/document-series-number-must-advance.error.ts
new file mode 100644
index 00000000..a9a1adb0
--- /dev/null
+++ b/modules/document-series/src/api/domain/errors/document-series-number-must-advance.error.ts
@@ -0,0 +1,11 @@
+export class DocumentSeriesNumberMustAdvanceError extends Error {
+  public constructor() {
+    super("Document series next number must be strictly greater than the current next number.");
+    this.name = "DocumentSeriesNumberMustAdvanceError";
+  }
+}
+
+export const isDocumentSeriesNumberMustAdvanceError = (
+  error: unknown
+): error is DocumentSeriesNumberMustAdvanceError =>
+  error instanceof DocumentSeriesNumberMustAdvanceError;
diff --git a/modules/document-series/src/api/domain/errors/index.ts b/modules/document-series/src/api/domain/errors/index.ts
index b6b6917d..05fa0db5 100644
--- a/modules/document-series/src/api/domain/errors/index.ts
+++ b/modules/document-series/src/api/domain/errors/index.ts
@@ -1,4 +1,6 @@
 export * from "./document-series-inactive.error";
+export * from "./document-series-inactive-default.error";
+export * from "./document-series-number-must-advance.error";
 export * from "./document-series-not-found.error";
 export * from "./document-series-out-of-validity.error";
 export * from "./document-series-transaction-required.error";
diff --git a/modules/document-series/src/api/infrastructure/common/persistence/sequelize/models/sequelize-document-series.model.ts b/modules/document-series/src/api/infrastructure/common/persistence/sequelize/models/sequelize-document-series.model.ts
index 6ee97169..84ec001b 100644
--- a/modules/document-series/src/api/infrastructure/common/persistence/sequelize/models/sequelize-document-series.model.ts
+++ b/modules/document-series/src/api/infrastructure/common/persistence/sequelize/models/sequelize-document-series.model.ts
@@ -26,6 +26,7 @@ export class DocumentSeriesModel extends Model<
   declare valid_to: CreationOptional<Date | null>;
   declare is_default: CreationOptional<boolean>;
   declare is_active: CreationOptional<boolean>;
+  declare has_assigned_numbers: CreationOptional<boolean>;
   declare created_at: CreationOptional<Date>;
   declare updated_at: CreationOptional<Date>;
   declare deleted_at: CreationOptional<Date | null>;
@@ -96,6 +97,11 @@ export default (database: Sequelize) => {
         allowNull: false,
         defaultValue: true,
       },
+      has_assigned_numbers: {
+        type: DataTypes.BOOLEAN,
+        allowNull: false,
+        defaultValue: false,
+      },
       created_at: {
         type: DataTypes.DATE,
         allowNull: false,
diff --git a/modules/document-series/src/api/infrastructure/di/document-series.di.ts b/modules/document-series/src/api/infrastructure/di/document-series.di.ts
index 167de082..a3129922 100644
--- a/modules/document-series/src/api/infrastructure/di/document-series.di.ts
+++ b/modules/document-series/src/api/infrastructure/di/document-series.di.ts
@@ -2,6 +2,7 @@ import { type ModuleParams, buildTransactionManager } from "@erp/core/api";
 
 import {
   DocumentSeriesFinder,
+  DocumentSeriesAdminService,
   DocumentSeriesNumberAssigner,
   DocumentSeriesWriter,
   type IDocumentSeriesRepository,
@@ -15,7 +16,7 @@ export type DocumentSeriesInternalDeps = {
 };
 
 export function buildDocumentSeriesDependencies(params: ModuleParams): DocumentSeriesInternalDeps {
-  const { database, transactionContext } = params;
+  const { database, transactionContext, audit } = params;
 
   const transactionManager = buildTransactionManager(database, transactionContext);
   const mapper = new SequelizeDocumentSeriesDomainMapper();
@@ -26,12 +27,14 @@ export function buildDocumentSeriesDependencies(params: ModuleParams): DocumentS
   const finder = new DocumentSeriesFinder(repository);
   const writer = new DocumentSeriesWriter(repository);
   const assigner = new DocumentSeriesNumberAssigner(repository);
+  const admin = new DocumentSeriesAdminService(repository, audit);
 
   return {
     useCases: buildDocumentSeriesUseCases({
       finder,
       writer,
       assigner,
+      admin,
       transactionManager,
     }),
   };
diff --git a/modules/document-series/src/api/infrastructure/express/controllers/advance-document-series-number.controller.ts b/modules/document-series/src/api/infrastructure/express/controllers/advance-document-series-number.controller.ts
new file mode 100644
index 00000000..466ad06c
--- /dev/null
+++ b/modules/document-series/src/api/infrastructure/express/controllers/advance-document-series-number.controller.ts
@@ -0,0 +1,31 @@
+import { ExpressController } from "@erp/core/api";
+
+import type { AdvanceDocumentSeriesNumberUseCase } from "../../../application";
+import { DocumentSeriesNumber } from "../../../domain";
+import { documentSeriesApiErrorMapper } from "../document-series-api-error-mapper";
+
+export class AdvanceDocumentSeriesNumberController extends ExpressController {
+  public constructor(private readonly useCase: AdvanceDocumentSeriesNumberUseCase) {
+    super();
+    this.errorMapper = documentSeriesApiErrorMapper;
+  }
+  protected async executeImpl() {
+    const companyId = this.getTenantId();
+    if (!companyId) {
+      return this.forbiddenError("Tenant ID not found");
+    }
+    const nextNumber = DocumentSeriesNumber.create(Number(this.req.body.next_number));
+    if (nextNumber.isFailure) {
+      return this.handleError(nextNumber.error);
+    }
+    const result = await this.useCase.execute({
+      companyId: companyId.toString(),
+      id: String(this.req.params.id),
+      nextNumber: nextNumber.data,
+    });
+    return result.match(
+      (data) => this.ok(data),
+      (error) => this.handleError(error)
+    );
+  }
+}
diff --git a/modules/document-series/src/api/infrastructure/express/controllers/disable-document-series.controller.ts b/modules/document-series/src/api/infrastructure/express/controllers/disable-document-series.controller.ts
index 874d4f6e..e6d99d62 100644
--- a/modules/document-series/src/api/infrastructure/express/controllers/disable-document-series.controller.ts
+++ b/modules/document-series/src/api/infrastructure/express/controllers/disable-document-series.controller.ts
@@ -1,10 +1,10 @@
 import { ExpressController } from "@erp/core/api";
 
-import type { DisableDocumentSeriesUseCase } from "../../../application";
+import type { ChangeDocumentSeriesStatusUseCase } from "../../../application";
 import { documentSeriesApiErrorMapper } from "../document-series-api-error-mapper";
 
 export class DisableDocumentSeriesController extends ExpressController {
-  public constructor(private readonly useCase: DisableDocumentSeriesUseCase) {
+  public constructor(private readonly useCase: ChangeDocumentSeriesStatusUseCase) {
     super();
     this.errorMapper = documentSeriesApiErrorMapper;
   }
@@ -18,6 +18,7 @@ export class DisableDocumentSeriesController extends ExpressController {
     const result = await this.useCase.execute({
       companyId: companyId.toString(),
       id: String(this.req.params.id),
+      action: "disable",
     });
 
     return result.match(
diff --git a/modules/document-series/src/api/infrastructure/express/controllers/enable-document-series.controller.ts b/modules/document-series/src/api/infrastructure/express/controllers/enable-document-series.controller.ts
new file mode 100644
index 00000000..03fc35e3
--- /dev/null
+++ b/modules/document-series/src/api/infrastructure/express/controllers/enable-document-series.controller.ts
@@ -0,0 +1,26 @@
+import { ExpressController } from "@erp/core/api";
+
+import type { ChangeDocumentSeriesStatusUseCase } from "../../../application";
+import { documentSeriesApiErrorMapper } from "../document-series-api-error-mapper";
+
+export class EnableDocumentSeriesController extends ExpressController {
+  public constructor(private readonly useCase: ChangeDocumentSeriesStatusUseCase) {
+    super();
+    this.errorMapper = documentSeriesApiErrorMapper;
+  }
+  protected async executeImpl() {
+    const companyId = this.getTenantId();
+    if (!companyId) {
+      return this.forbiddenError("Tenant ID not found");
+    }
+    const result = await this.useCase.execute({
+      companyId: companyId.toString(),
+      id: String(this.req.params.id),
+      action: "enable",
+    });
+    return result.match(
+      (data) => this.ok(data),
+      (error) => this.handleError(error)
+    );
+  }
+}
diff --git a/modules/document-series/src/api/infrastructure/express/controllers/index.ts b/modules/document-series/src/api/infrastructure/express/controllers/index.ts
index db34cdc0..5813c684 100644
--- a/modules/document-series/src/api/infrastructure/express/controllers/index.ts
+++ b/modules/document-series/src/api/infrastructure/express/controllers/index.ts
@@ -1,6 +1,9 @@
 export * from "./assign-next-document-number.controller";
+export * from "./advance-document-series-number.controller";
 export * from "./create-document-series.controller";
 export * from "./disable-document-series.controller";
+export * from "./enable-document-series.controller";
 export * from "./get-document-series-by-id.controller";
 export * from "./list-document-series.controller";
+export * from "./set-default-document-series.controller";
 export * from "./update-document-series.controller";
diff --git a/modules/document-series/src/api/infrastructure/express/controllers/set-default-document-series.controller.ts b/modules/document-series/src/api/infrastructure/express/controllers/set-default-document-series.controller.ts
new file mode 100644
index 00000000..d26e43c7
--- /dev/null
+++ b/modules/document-series/src/api/infrastructure/express/controllers/set-default-document-series.controller.ts
@@ -0,0 +1,25 @@
+import { ExpressController } from "@erp/core/api";
+
+import type { SetDefaultDocumentSeriesUseCase } from "../../../application";
+import { documentSeriesApiErrorMapper } from "../document-series-api-error-mapper";
+
+export class SetDefaultDocumentSeriesController extends ExpressController {
+  public constructor(private readonly useCase: SetDefaultDocumentSeriesUseCase) {
+    super();
+    this.errorMapper = documentSeriesApiErrorMapper;
+  }
+  protected async executeImpl() {
+    const companyId = this.getTenantId();
+    if (!companyId) {
+      return this.forbiddenError("Tenant ID not found");
+    }
+    const result = await this.useCase.execute({
+      companyId: companyId.toString(),
+      id: String(this.req.params.id),
+    });
+    return result.match(
+      (data) => this.ok(data),
+      (error) => this.handleError(error)
+    );
+  }
+}
diff --git a/modules/document-series/src/api/infrastructure/express/document-series-api-error-mapper.ts b/modules/document-series/src/api/infrastructure/express/document-series-api-error-mapper.ts
index 161079b3..1ed32f05 100644
--- a/modules/document-series/src/api/infrastructure/express/document-series-api-error-mapper.ts
+++ b/modules/document-series/src/api/infrastructure/express/document-series-api-error-mapper.ts
@@ -8,9 +8,13 @@ import {
 
 import {
   type DocumentSeriesInactiveError,
+  type DocumentSeriesInactiveDefaultError,
+  type DocumentSeriesNumberMustAdvanceError,
   type DocumentSeriesNotFoundError,
   type DocumentSeriesOutOfValidityError,
   isDocumentSeriesInactiveError,
+  isDocumentSeriesInactiveDefaultError,
+  isDocumentSeriesNumberMustAdvanceError,
   isDocumentSeriesNotFoundError,
   isDocumentSeriesOutOfValidityError,
 } from "../../domain";
@@ -33,7 +37,21 @@ const validityRule: ErrorToApiRule = {
   build: (error) => new ValidationApiError((error as DocumentSeriesOutOfValidityError).message),
 };
 
+const inactiveDefaultRule: ErrorToApiRule = {
+  priority: 120,
+  matches: (error) => isDocumentSeriesInactiveDefaultError(error),
+  build: (error) => new ValidationApiError((error as DocumentSeriesInactiveDefaultError).message),
+};
+
+const numberMustAdvanceRule: ErrorToApiRule = {
+  priority: 120,
+  matches: (error) => isDocumentSeriesNumberMustAdvanceError(error),
+  build: (error) => new ValidationApiError((error as DocumentSeriesNumberMustAdvanceError).message),
+};
+
 export const documentSeriesApiErrorMapper = ApiErrorMapper.default()
   .register(notFoundRule)
   .register(inactiveRule)
+  .register(inactiveDefaultRule)
+  .register(numberMustAdvanceRule)
   .register(validityRule);
diff --git a/modules/document-series/src/api/infrastructure/express/document-series.routes.ts b/modules/document-series/src/api/infrastructure/express/document-series.routes.ts
index 7445ec7b..74d253db 100644
--- a/modules/document-series/src/api/infrastructure/express/document-series.routes.ts
+++ b/modules/document-series/src/api/infrastructure/express/document-series.routes.ts
@@ -8,6 +8,7 @@ import { requireIdentityTenant } from "@erp/identity/api";
 import { type NextFunction, type Request, type Response, Router } from "express";
 
 import {
+  AdvanceDocumentSeriesNumberRequestSchema,
   AssignNextDocumentNumberRequestSchema,
   CreateDocumentSeriesRequestSchema,
   GetDocumentSeriesByIdRequestSchema,
@@ -17,11 +18,14 @@ import {
 import type { DocumentSeriesInternalDeps } from "../di";
 
 import {
+  AdvanceDocumentSeriesNumberController,
   AssignNextDocumentNumberController,
   CreateDocumentSeriesController,
   DisableDocumentSeriesController,
+  EnableDocumentSeriesController,
   GetDocumentSeriesByIdController,
   ListDocumentSeriesController,
+  SetDefaultDocumentSeriesController,
   UpdateDocumentSeriesController,
 } from "./controllers";
 
@@ -75,6 +79,15 @@ export const documentSeriesRouter = (params: StartParams) => {
     }
   );
 
+  router.patch(
+    "/:id/enable",
+    validateRequest(GetDocumentSeriesByIdRequestSchema, "params"),
+    (req: Request, res: Response, next: NextFunction) => {
+      const controller = new EnableDocumentSeriesController(deps.useCases.enableDocumentSeries());
+      return controller.execute(req, res, next);
+    }
+  );
+
   router.patch(
     "/:id/disable",
     validateRequest(GetDocumentSeriesByIdRequestSchema, "params"),
@@ -84,6 +97,29 @@ export const documentSeriesRouter = (params: StartParams) => {
     }
   );
 
+  router.patch(
+    "/:id/default",
+    validateRequest(GetDocumentSeriesByIdRequestSchema, "params"),
+    (req: Request, res: Response, next: NextFunction) => {
+      const controller = new SetDefaultDocumentSeriesController(
+        deps.useCases.setDefaultDocumentSeries()
+      );
+      return controller.execute(req, res, next);
+    }
+  );
+
+  router.patch(
+    "/:id/next-number",
+    validateRequest(GetDocumentSeriesByIdRequestSchema, "params"),
+    validateRequest(AdvanceDocumentSeriesNumberRequestSchema, "body"),
+    (req: Request, res: Response, next: NextFunction) => {
+      const controller = new AdvanceDocumentSeriesNumberController(
+        deps.useCases.advanceDocumentSeriesNumber()
+      );
+      return controller.execute(req, res, next);
+    }
+  );
+
   router.post(
     "/assign-next",
     validateRequest(AssignNextDocumentNumberRequestSchema, "body"),
diff --git a/modules/document-series/src/api/infrastructure/persistence/sequelize/mappers/sequelize-document-series-domain.mapper.ts b/modules/document-series/src/api/infrastructure/persistence/sequelize/mappers/sequelize-document-series-domain.mapper.ts
index ce6f3e96..980fddb7 100644
--- a/modules/document-series/src/api/infrastructure/persistence/sequelize/mappers/sequelize-document-series-domain.mapper.ts
+++ b/modules/document-series/src/api/infrastructure/persistence/sequelize/mappers/sequelize-document-series-domain.mapper.ts
@@ -81,6 +81,7 @@ export class SequelizeDocumentSeriesDomainMapper {
       validTo: validTo ?? Maybe.none(),
       isDefault: raw.is_default,
       isActive: raw.is_active,
+      hasAssignedNumbers: raw.has_assigned_numbers,
       createdAt: raw.created_at,
       updatedAt: raw.updated_at,
       deletedAt: Maybe.fromNullable(raw.deleted_at ?? undefined),
@@ -106,6 +107,7 @@ export class SequelizeDocumentSeriesDomainMapper {
       valid_to: source.validTo.getOrUndefined()?.toDate() ?? null,
       is_default: source.isDefault,
       is_active: source.isActive,
+      has_assigned_numbers: source.hasAssignedNumbers,
       created_at: source.createdAt,
       updated_at: source.updatedAt,
       deleted_at: source.deletedAt.getOrUndefined() ?? null,
diff --git a/modules/document-series/src/api/infrastructure/persistence/sequelize/repositories/document-series.repository.ts b/modules/document-series/src/api/infrastructure/persistence/sequelize/repositories/document-series.repository.ts
index 73c1430d..26a96e5e 100644
--- a/modules/document-series/src/api/infrastructure/persistence/sequelize/repositories/document-series.repository.ts
+++ b/modules/document-series/src/api/infrastructure/persistence/sequelize/repositories/document-series.repository.ts
@@ -240,6 +240,7 @@ export class SequelizeDocumentSeriesRepository
       const [affectedRows] = await DocumentSeriesModel.update(
         {
           next_number: persistedResult.data.next_number,
+          has_assigned_numbers: true,
           updated_at: persistedResult.data.updated_at,
         },
         {
@@ -261,6 +262,25 @@ export class SequelizeDocumentSeriesRepository
     }
   }
 
+  public async lockByCompanyAndDocumentType(
+    companyId: UniqueID,
+    documentType: import("../../../../domain").DocumentType,
+    transaction: unknown
+  ): Promise<Result<void, Error>> {
+    try {
+      const sequelizeTransaction = transaction as Transaction;
+      await DocumentSeriesModel.findAll({
+        attributes: ["id"],
+        where: { company_id: companyId.toString(), document_type: documentType.toPrimitive() },
+        transaction: sequelizeTransaction,
+        lock: sequelizeTransaction.LOCK.UPDATE,
+      });
+      return Result.ok();
+    } catch (error: unknown) {
+      return Result.fail(translateSequelizeError(error));
+    }
+  }
+
   private async resolveSeriesForUpdate(
     params: AssignNextNumberRepositoryParams,
     transaction: Transaction
diff --git a/modules/document-series/src/common/dto/request/advance-document-series-number.request.dto.ts b/modules/document-series/src/common/dto/request/advance-document-series-number.request.dto.ts
new file mode 100644
index 00000000..a8fb7874
--- /dev/null
+++ b/modules/document-series/src/common/dto/request/advance-document-series-number.request.dto.ts
@@ -0,0 +1,9 @@
+import { z } from "zod/v4";
+
+export const AdvanceDocumentSeriesNumberRequestSchema = z.object({
+  next_number: z.number().int().min(1),
+});
+
+export type AdvanceDocumentSeriesNumberRequestDTO = z.infer<
+  typeof AdvanceDocumentSeriesNumberRequestSchema
+>;
diff --git a/modules/document-series/src/common/dto/request/index.ts b/modules/document-series/src/common/dto/request/index.ts
index 780e4248..d98f2302 100644
--- a/modules/document-series/src/common/dto/request/index.ts
+++ b/modules/document-series/src/common/dto/request/index.ts
@@ -1,4 +1,5 @@
 export * from "./assign-next-document-number.request.dto";
+export * from "./advance-document-series-number.request.dto";
 export * from "./create-document-series.request.dto";
 export * from "./get-document-series-by-id.request.dto";
 export * from "./list-document-series.request.dto";
diff --git a/modules/document-series/src/common/dto/request/update-document-series.request.dto.test.ts b/modules/document-series/src/common/dto/request/update-document-series.request.dto.test.ts
new file mode 100644
index 00000000..001e9cb1
--- /dev/null
+++ b/modules/document-series/src/common/dto/request/update-document-series.request.dto.test.ts
@@ -0,0 +1,19 @@
+import assert from "node:assert/strict";
+import test from "node:test";
+
+import { UpdateDocumentSeriesRequestSchema } from "./update-document-series.request.dto";
+
+test("el update solo conserva configuración ordinaria", () => {
+  const parsed = UpdateDocumentSeriesRequestSchema.parse({
+    name: "Serie nueva",
+    prefix: "PF-",
+    branch_id: "00000000-0000-4000-8000-000000000001",
+    document_type: "issued_invoice",
+    code: "F",
+    next_number: 100,
+    is_default: true,
+    is_active: false,
+    has_assigned_numbers: true,
+  });
+  assert.deepEqual(parsed, { name: "Serie nueva", prefix: "PF-" });
+});
diff --git a/modules/document-series/src/common/dto/request/update-document-series.request.dto.ts b/modules/document-series/src/common/dto/request/update-document-series.request.dto.ts
index 136e26f0..5b442e65 100644
--- a/modules/document-series/src/common/dto/request/update-document-series.request.dto.ts
+++ b/modules/document-series/src/common/dto/request/update-document-series.request.dto.ts
@@ -6,19 +6,13 @@ export const UpdateDocumentSeriesParamsRequestSchema = z.object({
 
 export const UpdateDocumentSeriesRequestSchema = z
   .object({
-    branch_id: z.uuid().nullable().optional(),
-    document_type: z.enum(["proforma", "issued_invoice"]).optional(),
-    code: z.string().trim().min(1).max(20).optional(),
     name: z.string().trim().min(1).max(255).optional(),
     description: z.string().trim().max(4096).nullable().optional(),
     prefix: z.string().trim().max(50).nullable().optional(),
     suffix: z.string().trim().max(50).nullable().optional(),
-    next_number: z.number().int().min(1).optional(),
     padding: z.number().int().min(0).max(20).optional(),
     valid_from: z.iso.date().nullable().optional(),
     valid_to: z.iso.date().nullable().optional(),
-    is_default: z.boolean().optional(),
-    is_active: z.boolean().optional(),
   })
   .refine((value) => !(value.valid_from && value.valid_to) || value.valid_from <= value.valid_to, {
     path: ["valid_to"],
diff --git a/modules/document-series/src/common/dto/response/document-series.response.dto.ts b/modules/document-series/src/common/dto/response/document-series.response.dto.ts
index c7944462..b8d5bf4e 100644
--- a/modules/document-series/src/common/dto/response/document-series.response.dto.ts
+++ b/modules/document-series/src/common/dto/response/document-series.response.dto.ts
@@ -16,6 +16,7 @@ export const DocumentSeriesResponseSchema = z.object({
   valid_to: z.iso.date().nullable(),
   is_default: z.boolean(),
   is_active: z.boolean(),
+  has_assigned_numbers: z.boolean(),
   created_at: z.iso.datetime(),
   updated_at: z.iso.datetime(),
   deleted_at: z.iso.datetime().nullable(),
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 72b0ef08..12ee5201 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -1050,6 +1050,9 @@ importers:
       '@erp/identity':
         specifier: workspace:*
         version: link:../identity
+      '@repo/rdx-audit':
+        specifier: workspace:*
+        version: link:../../packages/rdx-audit
       '@repo/rdx-criteria':
         specifier: workspace:*
         version: link:../../packages/rdx-criteria
@@ -8522,7 +8525,7 @@ snapshots:
       detect-libc: 2.1.2
       is-glob: 4.0.3
       node-addon-api: 7.1.1
-      picomatch: 4.0.4
+      picomatch: 4.0.7
     optionalDependencies:
       '@parcel/watcher-android-arm64': 2.5.6
       '@parcel/watcher-darwin-arm64': 2.5.6