Chargeback reason codes vary by card scheme. Discover chargeback reason codes and their descriptions are listed below:
Reason Code Description
AP Cancelled Recurring Payment
AW Altered Amount
CD Credit Posted as a Sale
CR Cancelled Reservation
DP Duplicate Processing
NC Not Classified elsewhere
RG Non receipt of goods or services
RM Cardholder disputes quality or goods or services
RN Credit Not Received
DA Declined Authorization
EX Expired Card
IC Illegible Transaction Documentation Provide to Chargeback case
IN Invalid Card Number
IS Missing signature on draft retrieval
LP Late presentment
TF Dispute issued by Discover for a violation of their processing rules
UA10 Request signed receipt for key entered sale
UA20 Request transaction documentation for key entered sale
UA30 Request transaction documentation for card not present sale
You can access the details from the link below.
https://fiscal.treasury.gov/files/cas/chargeback_guide.pdf
How should the reason code be used?
Each code determines why the dispute was opened and what evidence the merchant must provide. For example, in a duplicate processing dispute, the merchant must prove that there were two separate transactions.
Merchants can prevent problems by analyzing the most frequent codes; for example, they can keep shipment tracking records for disputes over goods not received.
Since the codes can be updated by the scheme, the most up-to-date list should be checked in the scheme's documentation.
