| 400 | EXTSALESOPS-EXPRESS-CART-0001 | Required fields are missing. |
| 400 | EXTSALESOPS-EXPRESS-CART-0002 | Missing item in the cart. |
| 400 | EXTSALESOPS-EXPRESS-CART-0002 | Parent offer id not found in cart. |
| 400 | EXTSALESOPS-EXPRESS-CART-0003 | Delete item not supported at plan/equipment level. |
| 400 | EXTSALESOPS-EXPRESS-CART-0003 | Invalid service cart request. |
| 400 | EXTSALESOPS-EXPRESS-CART-0003 | Promotion already present in the cart |
| 400 | EXTSALESOPS-EXPRESS-CART-0003 | Invalid promotion provided in the request |
| 400 | EXTSALESOPS-EXPRESS-CART-0003 | Invalid service cart request. |
| 400 | EXTSALESOPS-EXPRESS-CART-0003 | Required cart type is missing. |
| 400 | EXTSALESOPS-EXPRESS-CART-0003 | Request is not allowed for BSSE Wireless Account Id |
| 400 | EXTSALESOPS-EXPRESS-CART-0003 | Cart Id is not valid. |
| 400 | EXTSALESOPS-EXPRESS-CART-0003 | Cart Id is not found. |
| 400 | EXTSALESOPS-EXPRESS-CART-0003 | Conflicting items in the cart. |
| 400 | EXTSALESOPS-EXPRESS-CART-0004 | Wireless Account Locked |
| 400 | EXTSALESOPS-EXPRESS-CART-0005 | HTTP method is not allowed |
| 400 | EXTSALESOPS-EXPRESS-PURCHASEORDER-0001 | Item id not found in the ProductOrder |
| 400 | EXTSALESOPS-EXPRESS-PURCHASEORDER-0001 | fulfillment option requires a shipping place |
| 400 | EXTSALESOPS-EXPRESS-PURCHASEORDER-0001 | Request missing store place. |
| 400 | EXTSALESOPS-EXPRESS-PURCHASEORDER-0001 | Request missing store id. |
| 400 | EXTSALESOPS-EXPRESS-PURCHASEORDER-0001 | Conflicting fulfillment options in the cart. |
| 400 | EXTSALESOPS-EXPRESS-PURCHASEORDER-0001 | Signature required reason is invalid |
| 400 | EXTSALESOPS-EXPRESS-PURCHASEORDER-0001 | Appointment Id could not be found |
| 400 | EXTSALESOPS-EXPRESS-PURCHASEORDER-0001 | Term is not Accepted . Accept all terms to proceed. |
| 400 | EXTSALESOPS-EXPRESS-PURCHASEORDER-0001 | Bad Request. Please check the request parameters |
| 400 | EXTSALESOPS-EXPRESS-UAS-0001 | Invalid Request as per minimal validation rules |
| 400 | EXTSALESOPS-EXPRESS-UAS-0001 | Appointment data not available. |
| 400 | EXTSALESOPS-EXPRESS-UAS-0001 | Invalid Request |
| 400 | EXTSALESOPS-EXPRESS-UAS-0001 | Reservation data not available. |
| 400 | EXTSALESOPS-EXPRESS-UAS-0002 | Appointment id not found. |
| 500 | EXTSALESOPS-EXPRESS-CART-0005 | Internal Server Error. |
| 500 | EXTSALESOPS-EXPRESS-UAS-0002 | Patch appointment failed. |
| 500 | EXTSALESOPS-EXPRESS-UAS-0002 | Internal Error occurred. |
| 500 | EXTSALESOPS-EXPRESS-UAS-0002 | Internal Error occurred. |
| 500 | EXTSALESOPS-EXPRESS-UAS-0002 | Requested Appointment date not available. |