diff --git a/server/src/contexts/sales/application/services/QuoteService.ts b/server/src/contexts/sales/application/services/QuoteService.ts
index a584004..1ae8fda 100644
--- a/server/src/contexts/sales/application/services/QuoteService.ts
+++ b/server/src/contexts/sales/application/services/QuoteService.ts
@@ -5,19 +5,37 @@ const generateQuoteReferenceForDealer = async (
   quoteRepository: IQuoteRepository
 ): Promise<QuoteReference> => {
   // Obtener la última referencia del dealer
-  const lastQuote = await quoteRepository.findLastQuoteByDealerId(dealer.id);
+  let lastQuoteReference = await quoteRepository.findLastReferenceByDealerId(dealer.id);
+  let isUnique = false;
 
-  // Generar la nueva referencia usando el Value Object
-  const quoteReferenceResult = QuoteReference.fromPrevious(
-    lastQuote ? lastQuote.reference : null,
-    dealer
-  );
+  // Referencia temporal
+  let newQuoteReference: QuoteReference = QuoteReference.create(undefined).object;
 
-  if (quoteReferenceResult.isFailure) {
-    throw new Error("Error al crear la referencia de presupuesto");
+  while (!isUnique) {
+    // Generar la nueva referencia usando el Value Object
+    const quoteReferenceOrError = QuoteReference.fromPrevious(
+      lastQuoteReference ? lastQuoteReference : null,
+      dealer
+    );
+
+    if (quoteReferenceOrError.isFailure) {
+      throw new Error("Error al crear la referencia de presupuesto");
+    }
+
+    newQuoteReference = quoteReferenceOrError.object;
+
+    // Verificar si la referencia ya existe
+    const existingQuote = await quoteRepository.existsByReference(newQuoteReference);
+
+    if (!existingQuote) {
+      isUnique = true;
+    } else {
+      // Utilizamos la última referencia encontrada para continuar la generación
+      lastQuoteReference = newQuoteReference;
+    }
   }
 
-  return quoteReferenceResult.object;
+  return newQuoteReference;
 };
 
 export { generateQuoteReferenceForDealer };
diff --git a/server/src/contexts/sales/domain/repository/QuoteRepository.interface.ts b/server/src/contexts/sales/domain/repository/QuoteRepository.interface.ts
index d6f84f7..26736f5 100644
--- a/server/src/contexts/sales/domain/repository/QuoteRepository.interface.ts
+++ b/server/src/contexts/sales/domain/repository/QuoteRepository.interface.ts
@@ -1,10 +1,12 @@
 /* eslint-disable no-unused-vars */
 import { IRepository } from "@/contexts/common/domain/repositories";
 import { ICollection, IQueryCriteria, UniqueID } from "@shared/contexts";
-import { Quote } from "../entities";
+import { Quote, QuoteReference } from "../entities";
 
 export interface IQuoteRepository extends IRepository<Quote> {
   exists(id: UniqueID): Promise<boolean>;
+  existsByReference(reference: QuoteReference): Promise<boolean>;
+
   create(quote: Quote): Promise<void>;
   update(quote: Quote): Promise<void>;
 
@@ -14,4 +16,5 @@ export interface IQuoteRepository extends IRepository<Quote> {
   removeById(id: UniqueID): Promise<void>;
 
   findLastQuoteByDealerId(dealerId: UniqueID): Promise<Quote | null>;
+  findLastReferenceByDealerId(dealerId: UniqueID): Promise<QuoteReference | null>;
 }
diff --git a/server/src/contexts/sales/infrastructure/Quote.repository.ts b/server/src/contexts/sales/infrastructure/Quote.repository.ts
index 5ca541c..85e4cec 100644
--- a/server/src/contexts/sales/infrastructure/Quote.repository.ts
+++ b/server/src/contexts/sales/infrastructure/Quote.repository.ts
@@ -3,7 +3,7 @@ import { ICollection, IQueryCriteria, UniqueID } from "@shared/contexts";
 import { ModelDefined, Transaction } from "sequelize";
 
 import { IQuoteRepository } from "../domain";
-import { Quote } from "../domain/entities";
+import { Quote, QuoteReference } from "../domain/entities";
 import { ISalesContext } from "./Sales.context";
 import { IQuoteMapper, createQuoteMapper } from "./mappers/quote.mapper";
 
@@ -29,6 +29,10 @@ export class QuoteRepository extends SequelizeRepository<Quote> implements IQuot
     return this._exists("Quote_Model", "id", id.toPrimitive());
   }
 
+  public async existsByReference(reference: QuoteReference): Promise<boolean> {
+    return this._exists("Quote_Model", "reference", reference.toPrimitive());
+  }
+
   public async create(user: Quote): Promise<void> {
     const userData = this.mapper.mapToPersistence(user);
     await this._save("Quote_Model", user.id, userData);
@@ -134,6 +138,11 @@ export class QuoteRepository extends SequelizeRepository<Quote> implements IQuot
 
     return this.mapper.mapToDomain(rawQuote);
   }
+
+  public async findLastReferenceByDealerId(dealerId: UniqueID): Promise<QuoteReference | null> {
+    const quote = await this.findLastQuoteByDealerId(dealerId);
+    return quote ? quote.reference : null;
+  }
 }
 
 export const registerQuoteRepository = (context: ISalesContext) => {