TC40

Visa's fraud-reporting message, filed by the issuer against transactions flagged as fraudulent. TC40 reports feed into VAMP's combined fraud + dispute ratio, even when the cardholder doesn't file a formal chargeback. Merchants can subscribe to TC40 alerts to identify fraud trends before they become disputes.

In practice.

TC40 reports are the Visa record of confirmed fraud, filed by issuers independently of chargebacks. They feed VFMP monitoring, so a merchant can accumulate fraud reports without matching disputes and still breach thresholds. Fraud screening and 3DS strategy are the levers that keep TC40 volume down.

Related terms: VAMP · VFMP · Fraud rate · SAFE