diff --git a/apps/backend/src/domain/entities/csv-booking.entity.ts b/apps/backend/src/domain/entities/csv-booking.entity.ts
index 86f9082..7d92ab0 100644
--- a/apps/backend/src/domain/entities/csv-booking.entity.ts
+++ b/apps/backend/src/domain/entities/csv-booking.entity.ts
@@ -137,6 +137,10 @@ export class CsvBooking {
     if (!this.confirmationToken || this.confirmationToken.trim().length === 0) {
       throw new Error('Confirmation token is required');
     }
+
+    if (!this.documents || this.documents.length === 0) {
+      throw new Error('At least one document is required for booking');
+    }
   }
 
   /**