| Code | Description | How To Win |
|---|---|---|
| AA | Cardholder Does Not Recognize | |
| AL | Airline Transaction Dispute | |
| CA | Cash Advance Dispute | |
| CD | Credit Posted as Card Sale | |
| DA | Declined Authorization | |
| DP | Duplicate Processing | |
| EX | Expired Card | |
| IC | Illegible Sales Data | |
| IN | Invalid Card Number | |
| LP | Late Presentment | |
| N | Discover Network ATM Transaction – No Funds Dispensed | |
| NA | No Authorization | |
| NC | Not Classified | |
| P | Discover Network ATM Transaction – Partial Funds Dispensed | |
| RG | Non-Receipt of Goods or Services | |
| RM | Cardholder Disputes Quality of Goods or Services | |
| RN2 Or RN | Non-Receipt of Credit | |
| UA01 | No Authorization | |
| UA02 | Declined Authorization | |
| UA10 | Request Transaction Receipt for Swiped Card Transaction | |
| UA11 | Swiped Card Transaction – No Cardholder Signature Obtained | |
| UA12 | Swiped Card Transaction – Invalid Signature | |
| UA18 | Swiped Card Transaction – Illegible Transaction Documentation | |
| UA20 | Request Transaction Documentation for Keyed Card Transaction. | |
| UA30 | Request Transaction Documentation for Card Not Present Card Transaction |
