Mastercard reason code 4849
Mastercard 4849: Questionable Merchant Activity
What the cardholder is claiming
This one is not the cardholder complaining. It is Mastercard's own audit machinery: the issuer is clawing back the transaction because your merchant account was listed under a Mastercard fraud-monitoring program (GMAP or QMAP) or named in a Global Security Bulletin, which gives issuers a standing chargeback right against your sales.
The evidence that actually wins
Bank analysts skim responses in minutes against a checklist for this exact code. Lead with the strongest fact; never make them dig.
- ✓The exact bulletin or audit-program notice the issuer cited, with its effective dates and the listed entity names, requested through your acquirer
- ✓Proof your legal entity, DBA, and merchant ID are not actually on the cited listing
- ✓Proof the transaction was processed outside the listing's effective window (issuers get 180 days from the bulletin date, and they sometimes reach too far)
- ✓Standard legitimacy documentation for the transaction itself: authorization, delivery proof, cardholder communication
- ✓Written confirmation from your acquirer of your current GMAP/QMAP status
The honest read
If your merchant ID is genuinely on the cited list, responding to individual chargebacks is close to pointless. The real problem is your standing with the network, and that conversation happens between your acquirer and Mastercard, not inside a dispute response. Fight only when the listing itself is wrong: wrong entity, wrong merchant ID, or a transaction outside the effective window. Seeing 4849s at all is an account-survival alarm that deserves your full attention on the audit-program side, not your dispute-ops side.
Nobody can promise you a win; the cardholder's bank decides. What you control is submitting the strongest complete case your records support, on time. Our plain-language guarantees say exactly what that means.
Fighting a 4849 right now?
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