Discover Chargeback Reason Codes
AP Canceled Recurring Transaction
DP Duplicate Processing
NF Non-Receipt of Cash from ATM
PM Paid by Other Means
DA Declined Authorization
AA Cardholder Does Not Recognize
AW Altered Amount
CD Credit Posted as Card Sale
RG Non-Receipt of Goods or Services
RM Quality Discrepancy
AT Authorization Non-compliance
EX Expired Card
NA No Authorization
IN Invalid Card Number
LP Late Presentment
RN2 Credit Not Processed
05 Issuer Sent a Retrieval Request and the Merchant Responded by Accepting Liability
UA01 Fraud: Card Present Transaction
UA02 Fraud: Card Not Present Transaction
UA06 Fraud: Chip and PIN Transaction
UA05 Fraud: Chip Card Counterfeit Transaction