Enumeration at Scale: How Fraudsters Are Testing the Payments Ecosystem | Presented by Visa

The Merchant Risk Council (MRC) hosts this one-hour webinar presented by Visa on 21 October 2026, starting at 12:00 pm Eastern time (ET).

Payment fraud has moved from stolen databases to real-time automated attacks. Enumeration — systematically guessing payment credentials at scale — is now one of the forces reshaping card-not-present fraud. Visa's experts will show why it is growing, how attackers exploit payment flows and how quickly losses follow a successful guess. Learning objectives include defining enumeration and distinguishing it from traditional data compromise, and understanding how speed, scale and automation change the economics of fraud. The session also covers emerging areas of risk and the role of layered controls, real-time analytics and industry collaboration.

Who should attend

MRC's audience of merchant fraud and payments teams, plus PSPs, gateways and acquirers whose checkout endpoints are targeted by card-testing bots. The card enumeration webinar helps teams align their prevention rules with what the network sees across the ecosystem.

Tickets and access

Free to attend; registration is required.