
Mastercard’s New Scam-Merchant Monitoring Rules
Reading Time: 3 minutesEffective July 24, 2026, Mastercard’s new scam-merchant monitoring rule will require acquirers and payment facilitators (payfacs) to investigate certain warning signs within 72 hours. If the merchant is confirmed to be engaged in scam activity, Mastercard processing must be blocked. The rule applies to card-not-present merchants and sponsored merchants. It










