diff --git a/src/controllers/03-customer-controller.ts b/src/controllers/03-customer-controller.ts
index 9af0a15..b2c4545 100644
--- a/src/controllers/03-customer-controller.ts
+++ b/src/controllers/03-customer-controller.ts
@@ -336,7 +336,9 @@ export class CustomerController extends Controller {
       );
     }
 
-    await permissionCheck(req.user, customer.registeredBranch);
+    if (customer.registeredBranch) {
+      await permissionCheck(req.user, customer.registeredBranch);
+    }
 
     if (body.registeredBranchId !== undefined && branch) {
       await permissionCheck(req.user, branch);