Disputes, Fraud, and Security


Address Verification Service and Card Verification Value Responses
List of result codes if CVV and/or AVS were used on a transaction.
Visa’s Decline Code Grouping
Information about Visa's rules for decline code reasons and appropriate retry strategies.
MasterCard's Decline Code Grouping and MAC
Information about MasterCard's decline code grouping program (MAC).
Fraud Prevention Settings
Information on the fraud prevention settings available for Maast products.