diff --git a/src/card/services/card.service.ts b/src/card/services/card.service.ts
index 92df9ab..5138824 100644
--- a/src/card/services/card.service.ts
+++ b/src/card/services/card.service.ts
@@ -34,6 +34,10 @@ export class CardService {
       throw new BadRequestException('CUSTOMER.KYC_NOT_APPROVED');
     }
 
+    if (!customer.neoleapExternalCustomerId) {
+      throw new BadRequestException('CUSTOMER.KYC_NOT_COMPLETED');
+    }
+
     if (customer.cards.length > 0) {
       throw new BadRequestException('CUSTOMER.ALREADY_HAS_CARD');
     }
diff --git a/src/common/modules/neoleap/services/neoleap.service.ts b/src/common/modules/neoleap/services/neoleap.service.ts
index bd881cc..463a72f 100644
--- a/src/common/modules/neoleap/services/neoleap.service.ts
+++ b/src/common/modules/neoleap/services/neoleap.service.ts
@@ -188,7 +188,9 @@ export class NeoLeapService {
           },
           BillingCycle: 'C1',
         },
-        ApplicationOtherInfo: {},
+        ApplicationOtherInfo: {
+          ExternalCorporateId: customer.neoleapExternalCustomerId,
+        },
         ApplicationCustomerDetails: {
           FirstName: customer.firstName,
           LastName: customer.lastName,
diff --git a/src/customer/services/customer.service.ts b/src/customer/services/customer.service.ts
index a7b8694..5fc67fb 100644
--- a/src/customer/services/customer.service.ts
+++ b/src/customer/services/customer.service.ts
@@ -163,14 +163,15 @@ export class CustomerService {
       completedAt: new Date(),
     });
 
-    // Update customer KYC status
+    // Update customer KYC status and external customer ID
     const kycStatus = body.status === 'ONBOARDING_SUCCESS' ? KycStatus.APPROVED : KycStatus.REJECTED;
-    
+
     await this.customerRepository.updateCustomer(customer.id, {
       kycStatus,
+      neoleapExternalCustomerId: body.entity.externalId,
     });
 
-    this.logger.log(`KYC updated successfully for customer ${customer.id}, status: ${body.status}`);
+    this.logger.log(`KYC updated successfully for customer ${customer.id}, status: ${body.status}, externalId: ${body.entity.externalId}`);
   }
 
   // TO BE REMOVED: This function is for testing only and will be removed