
Mastercard GMAP Explained: What Acquirers Need to Know Before April 2027
Mastercard is retiring the Acquirer Chargeback Monitoring Program and replacing it with a single framework: the Global Merchant Audit Program, or GMAP. It takes effect April 1, 2027, and for the first time, Mastercard scores Acquirers on the same fraud-and-dispute calculation it uses for Merchants. If you’ve worked through Visa’s


