diff --git a/apps/server/src/config/database.ts b/apps/server/src/config/database.ts
index 06d5a033..1ec3b771 100644
--- a/apps/server/src/config/database.ts
+++ b/apps/server/src/config/database.ts
@@ -59,7 +59,9 @@ function buildSequelize(): Sequelize {
       idle: 10_000,
       acquire: 30_000,
     },
-    // dialectOptions: { /* según dialecto (ssl, etc.) */ },
+    dialectOptions: {
+      timezone: ENV.APP_TIMEZONE,
+    },
   } as const;
 
   if (ENV.DATABASE_URL && ENV.DATABASE_URL.trim() !== "") {
diff --git a/modules/auth/src/api/lib/express/mock-user.middleware.ts b/modules/auth/src/api/lib/express/mock-user.middleware.ts
index d9291eb7..3194a78b 100644
--- a/modules/auth/src/api/lib/express/mock-user.middleware.ts
+++ b/modules/auth/src/api/lib/express/mock-user.middleware.ts
@@ -5,9 +5,9 @@ import { RequestWithAuth } from "./auth-types";
 export function mockUser(req: RequestWithAuth, res: Response, next: NextFunction) {
   if (process.env.NODE_ENV === "development") {
     req.user = {
-      id: UniqueID.create("9e4dc5b3-96b9-4968-9490-14bd032fec5f").data,
+      userId: UniqueID.create("9e4dc5b3-96b9-4968-9490-14bd032fec5f").data,
       email: EmailAddress.create("dev@example.com").data,
-      companyId: UniqueID.create("1e4dc5b3-96b9-4968-9490-14bd032fec5f").data,
+      companyId: UniqueID.create("5e4dc5b3-96b9-4968-9490-14bd032fec5f").data,
       roles: ["admin"],
     };
   }
diff --git a/modules/core/src/api/domain/errors/entity-not-found-error.ts b/modules/core/src/api/domain/errors/entity-not-found-error.ts
index ed262f00..53782206 100644
--- a/modules/core/src/api/domain/errors/entity-not-found-error.ts
+++ b/modules/core/src/api/domain/errors/entity-not-found-error.ts
@@ -1,7 +1,7 @@
 import { DomainError } from "./domain-error";
 
 export class EntityNotFoundError extends DomainError {
-  constructor(entity: string, field: string, value: string, options?: ErrorOptions) {
+  constructor(entity: string, field: string, value: any, options?: ErrorOptions) {
     super(`Entity '${entity}' with ${field} '${value}' was not found.`, options);
     this.name = "EntityNotFoundError";
   }
diff --git a/modules/customers/src/api/application/create-customer/create-customer.use-case.ts b/modules/customers/src/api/application/create-customer/create-customer.use-case.ts
index 0994114c..b828aaac 100644
--- a/modules/customers/src/api/application/create-customer/create-customer.use-case.ts
+++ b/modules/customers/src/api/application/create-customer/create-customer.use-case.ts
@@ -9,6 +9,7 @@ import { mapDTOToCreateCustomerProps } from "./map-dto-to-create-customer-props"
 
 type CreateCustomerUseCaseInput = {
   dto: CreateCustomerRequestDTO;
+  companyId: UniqueID;
 };
 
 export class CreateCustomerUseCase {
@@ -19,7 +20,7 @@ export class CreateCustomerUseCase {
   ) {}
 
   public execute(params: CreateCustomerUseCaseInput) {
-    const { dto } = params;
+    const { dto, companyId } = params;
 
     // 1) Mapear DTO → props de dominio
     const dtoResult = mapDTOToCreateCustomerProps(dto);
@@ -27,14 +28,12 @@ export class CreateCustomerUseCase {
       return Result.fail(dtoResult.error);
     }
 
-    const mapped = dtoResult.data;
-    const id = mapped.id;
-    const { companyId, ...customerProps } = mapped.props;
+    const { props, id } = dtoResult.data;
 
-    console.debug("Creating customer with props:", customerProps);
+    console.debug("Creating customer with props:", props);
 
     // 3) Construir entidad de dominio
-    const buildResult = this.service.buildCustomerInCompany(companyId, customerProps, id);
+    const buildResult = this.service.buildCustomerInCompany(companyId, props, id);
     if (buildResult.isFailure) {
       return Result.fail(buildResult.error);
     }
diff --git a/modules/customers/src/api/application/create-customer/map-dto-to-create-customer-props.ts b/modules/customers/src/api/application/create-customer/map-dto-to-create-customer-props.ts
index 8898ec70..74b394bf 100644
--- a/modules/customers/src/api/application/create-customer/map-dto-to-create-customer-props.ts
+++ b/modules/customers/src/api/application/create-customer/map-dto-to-create-customer-props.ts
@@ -44,7 +44,7 @@ export function mapDTOToCreateCustomerProps(dto: CreateCustomerRequestDTO) {
     const customerId = extractOrPushError(UniqueID.create(dto.id), "id", errors);
     const companyId = extractOrPushError(UniqueID.create(dto.company_id), "company_id", errors);
 
-    const isCompany = dto.is_company;
+    const isCompany = dto.is_company === "true";
     const status = extractOrPushError(CustomerStatus.create(dto.status), "status", errors);
     const reference = extractOrPushError(
       maybeFromNullableVO(dto.reference, (value) => Name.create(value)),
@@ -146,7 +146,7 @@ export function mapDTOToCreateCustomerProps(dto: CreateCustomerRequestDTO) {
 
     const defaultTaxes = new Collection<TaxCode>();
 
-    dto.default_taxes.map((taxCode, index) => {
+    dto.default_taxes.split(",").map((taxCode, index) => {
       const tax = extractOrPushError(TaxCode.create(taxCode), `default_taxes.${index}`, errors);
       if (tax) {
         defaultTaxes.add(tax!);
diff --git a/modules/customers/src/api/application/delete-customer/delete-customer.use-case.ts b/modules/customers/src/api/application/delete-customer/delete-customer.use-case.ts
index ee874bc0..577f5026 100644
--- a/modules/customers/src/api/application/delete-customer/delete-customer.use-case.ts
+++ b/modules/customers/src/api/application/delete-customer/delete-customer.use-case.ts
@@ -33,11 +33,13 @@ export class DeleteCustomerUseCase {
           return Result.fail(existsCheck.error);
         }
 
-        if (!existsCheck.data) {
+        const customerExists = existsCheck.data;
+
+        if (!customerExists) {
           return Result.fail(new EntityNotFoundError("Customer", "id", validId.toString()));
         }
 
-        return await this.service.deleteCustomerByIdInCompany(validId, transaction);
+        return await this.service.deleteCustomerByIdInCompany(validId, companyId, transaction);
       } catch (error: unknown) {
         return Result.fail(error as Error);
       }
diff --git a/modules/customers/src/api/domain/repositories/customer-repository.interface.ts b/modules/customers/src/api/domain/repositories/customer-repository.interface.ts
index 3b6e5a9a..f8501c88 100644
--- a/modules/customers/src/api/domain/repositories/customer-repository.interface.ts
+++ b/modules/customers/src/api/domain/repositories/customer-repository.interface.ts
@@ -13,7 +13,7 @@ export interface ICustomerRepository {
    * Guarda (crea o actualiza) un Customer en la base de datos.
    * Retorna el objeto actualizado tras la operación.
    */
-  save(customer: Customer, transaction?: any): Promise<Result<Customer, Error>>;
+  save(customer: Customer, transaction: any): Promise<Result<Customer, Error>>;
 
   /**
    * Comprueba si existe un Customer con un `id` dentro de una `company`.
@@ -48,5 +48,5 @@ export interface ICustomerRepository {
    * Elimina un Customer por su ID, dentro de una empresa.
    * Retorna `void` si se elimina correctamente, o `NotFoundError` si no existía.
    */
-  deleteByIdInCompany(companyId: UniqueID, id: UniqueID, transaction?: any): Promise<Result<void>>;
+  deleteByIdInCompany(companyId: UniqueID, id: UniqueID, transaction: any): Promise<Result<void>>;
 }
diff --git a/modules/customers/src/api/infrastructure/express/controllers/create-customer.controller.ts b/modules/customers/src/api/infrastructure/express/controllers/create-customer.controller.ts
index 52262088..ccd293de 100644
--- a/modules/customers/src/api/infrastructure/express/controllers/create-customer.controller.ts
+++ b/modules/customers/src/api/infrastructure/express/controllers/create-customer.controller.ts
@@ -1,5 +1,5 @@
 import { ExpressController, authGuard, forbidQueryFieldGuard, tenantGuard } from "@erp/core/api";
-import { UpdateCustomerRequestDTO } from "../../../../common/dto";
+import { CreateCustomerRequestDTO } from "../../../../common/dto";
 import { CreateCustomerUseCase } from "../../../application";
 
 export class CreateCustomerController extends ExpressController {
@@ -11,12 +11,9 @@ export class CreateCustomerController extends ExpressController {
 
   protected async executeImpl() {
     const companyId = this.getTenantId()!; // garantizado por tenantGuard
-    const dto = this.req.body as UpdateCustomerRequestDTO;
+    const dto = this.req.body as CreateCustomerRequestDTO;
 
-    // Inyectar empresa del usuario autenticado (ownership)
-    dto.company_id = companyId.toString();
-
-    const result = await this.useCase.execute({ dto });
+    const result = await this.useCase.execute({ dto, companyId });
 
     return result.match(
       (data) => this.created(data),
diff --git a/modules/customers/src/api/infrastructure/express/customers.routes.ts b/modules/customers/src/api/infrastructure/express/customers.routes.ts
index ef60013f..4a8bcd38 100644
--- a/modules/customers/src/api/infrastructure/express/customers.routes.ts
+++ b/modules/customers/src/api/infrastructure/express/customers.routes.ts
@@ -3,6 +3,7 @@ import { ILogger, ModuleParams, validateRequest } from "@erp/core/api";
 import { Application, NextFunction, Request, Response, Router } from "express";
 import { Sequelize } from "sequelize";
 import {
+  CreateCustomerRequestSchema,
   CustomerListRequestSchema,
   DeleteCustomerByIdRequestSchema,
   GetCustomerByIdRequestSchema,
@@ -15,6 +16,7 @@ import {
   GetCustomerController,
   ListCustomersController,
 } from "./controllers";
+import { UpdateCustomerController } from "./controllers/update-customer.controller";
 
 export const customersRouter = (params: ModuleParams) => {
   const { app, database, baseRoutePath, logger } = params as {
@@ -64,7 +66,7 @@ export const customersRouter = (params: ModuleParams) => {
     "/",
     //checkTabContext,
 
-    validateRequest(UpdateCustomerRequestSchema),
+    validateRequest(CreateCustomerRequestSchema),
     (req: Request, res: Response, next: NextFunction) => {
       const useCase = deps.build.create();
       const controller = new CreateCustomerController(useCase);
@@ -72,15 +74,17 @@ export const customersRouter = (params: ModuleParams) => {
     }
   );
 
-  /*routes.put(
+  router.put(
     "/:customerId",
-    validateAndParseBody(IUpdateCustomerRequestSchema),
-    checkTabContext,
+    //checkTabContext,
 
+    validateRequest(UpdateCustomerRequestSchema),
     (req: Request, res: Response, next: NextFunction) => {
-      buildUpdateCustomerController().execute(req, res, next);
+      const useCase = deps.build.update();
+      const controller = new UpdateCustomerController(useCase);
+      return controller.execute(req, res, next);
     }
-  );*/
+  );
 
   router.delete(
     "/:id",
diff --git a/modules/customers/src/api/infrastructure/sequelize/customer.repository.ts b/modules/customers/src/api/infrastructure/sequelize/customer.repository.ts
index d781afd2..b7658eba 100644
--- a/modules/customers/src/api/infrastructure/sequelize/customer.repository.ts
+++ b/modules/customers/src/api/infrastructure/sequelize/customer.repository.ts
@@ -56,7 +56,7 @@ export class CustomerRepository
   async existsByIdInCompany(
     companyId: UniqueID,
     id: UniqueID,
-    transaction?: any
+    transaction?: Transaction
   ): Promise<Result<boolean, Error>> {
     try {
       const count = await CustomerModel.count({
@@ -80,7 +80,7 @@ export class CustomerRepository
   async getByIdInCompany(
     companyId: UniqueID,
     id: UniqueID,
-    transaction?: any
+    transaction?: Transaction
   ): Promise<Result<Customer, Error>> {
     try {
       const row = await CustomerModel.findOne({
@@ -113,7 +113,7 @@ export class CustomerRepository
   async findByCriteriaInCompany(
     companyId: UniqueID,
     criteria: Criteria,
-    transaction?: any
+    transaction?: Transaction
   ): Promise<Result<Collection<Customer>>> {
     try {
       const converter = new CriteriaToSequelizeConverter();
@@ -124,8 +124,6 @@ export class CustomerRepository
         company_id: companyId.toString(),
       };
 
-      console.debug({ model: "CustomerModel", criteria, query });
-
       const instances = await CustomerModel.findAll({
         ...query,
         transaction,
@@ -150,17 +148,17 @@ export class CustomerRepository
   async deleteByIdInCompany(
     companyId: UniqueID,
     id: UniqueID,
-    transaction?: any
+    transaction: Transaction
   ): Promise<Result<void>> {
     try {
+      console.log(id, companyId);
       const deleted = await CustomerModel.destroy({
         where: { id: id.toString(), company_id: companyId.toString() },
         transaction,
       });
 
-      if (deleted === 0) {
-        return Result.fail(new Error(`Customer with id ${id} not found in company ${companyId}.`));
-      }
+      console.log(deleted);
+
       return Result.ok<void>();
     } catch (err: unknown) {
       // , `Error deleting customer ${id} in company ${companyId}`
diff --git a/modules/customers/src/common/dto/request/create-customer.request.dto.ts b/modules/customers/src/common/dto/request/create-customer.request.dto.ts
index 514ee276..1f19d889 100644
--- a/modules/customers/src/common/dto/request/create-customer.request.dto.ts
+++ b/modules/customers/src/common/dto/request/create-customer.request.dto.ts
@@ -5,7 +5,7 @@ export const CreateCustomerRequestSchema = z.object({
   company_id: z.uuid(),
   reference: z.string().default(""),
 
-  is_company: z.boolean().default(false),
+  is_company: z.string().toLowerCase().default("false"),
   name: z.string().default(""),
   trade_name: z.string().default(""),
   tin: z.string().default(""),
@@ -24,10 +24,10 @@ export const CreateCustomerRequestSchema = z.object({
 
   legal_record: z.string().default(""),
 
-  default_taxes: z.array(z.string()).default([]),
-  status: z.string().default("active"),
-  language_code: z.string().default("es"),
-  currency_code: z.string().default("EUR"),
+  default_taxes: z.string().default(""),
+  status: z.string().toLowerCase().default("active"),
+  language_code: z.string().toLowerCase().default("es"),
+  currency_code: z.string().toUpperCase().default("EUR"),
 });
 
 export type CreateCustomerRequestDTO = z.infer<typeof CreateCustomerRequestSchema>;
diff --git a/modules/customers/src/common/dto/request/update-customer.request.dto.ts b/modules/customers/src/common/dto/request/update-customer.request.dto.ts
index 002c729f..5d292a92 100644
--- a/modules/customers/src/common/dto/request/update-customer.request.dto.ts
+++ b/modules/customers/src/common/dto/request/update-customer.request.dto.ts
@@ -3,7 +3,7 @@ import * as z from "zod/v4";
 export const UpdateCustomerRequestSchema = z.object({
   reference: z.string().optional(),
 
-  is_company: z.boolean().optional(),
+  is_company: z.string().optional(),
   name: z.string().optional(),
   trade_name: z.string().optional(),
   tin: z.string().optional(),
@@ -22,7 +22,7 @@ export const UpdateCustomerRequestSchema = z.object({
 
   legal_record: z.string().optional(),
 
-  default_taxes: z.array(z.string()).optional(), // completo (sustituye), o null => vaciar
+  default_taxes: z.string().optional(), // completo (sustituye), o null => vaciar
   language_code: z.string().optional(),
   currency_code: z.string().optional(),
 });