Visa reason code 12.4
Visa 12.4: Incorrect Account Number
What the cardholder is claiming
The issuer says the account number that was charged does not match the account of the person who actually made the purchase, meaning the wrong cardholder was billed, usually through a manual keying error.
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 authorization record showing the account number you charged is the same number that was authorized
- ✓The receipt or order record showing the card number the customer presented matches what settled
- ✓For keyed or phone orders: the order form or call record tying that specific card number to that specific customer
- ✓Proof the transaction was card-read by chip or swipe rather than manually keyed, which makes a wrong-number claim implausible
The honest read
In practice this is nearly always a manual-entry mistake, one digit off on a phone order, and the person who got charged genuinely bought nothing from you. If that is what happened, accept the reversal and rebill the correct customer, because you cannot defend a charge to a stranger. Fight only when the auth trail proves the charged number is exactly the number that was presented and authorized.
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 12.4 right now?
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