Visa Chargeback Reason Code
Visa Reason Code 12.4: Incorrect Account Number
Category Processing ErrorsBy Payment Defender Editorial TeamUpdated July 17, 2026Last reviewed July 17, 2026
What Visa Reason Code 12.4 Means
Visa reason code 12.4 applies when a transaction was processed against an incorrect account number, so the charge posted to an account other than the one intended.
Why This Chargeback Happens
This dispute commonly occurs from manual key-entry errors, mistranscribed card numbers, or system errors that submit the wrong account number for settlement.
What the Cardholder or Issuer Is Claiming
The issuer claims the transaction was submitted with an account number that does not match the account used for the purchase.
What Merchants Should Review
Review the account number submitted, the authorization record, the card data captured at the point of sale, and any key-entry logs.
Recommended Chargeback Evidence
- Authorization records showing the account number used
- Point-of-sale card capture data
- Documentation reconciling the correct account number
How to Prevent Similar Disputes
These disputes may be reduced by using electronic card capture rather than manual entry where possible, validating card numbers, and reconciling settlement records against authorizations.
Important Limitations
This page is educational and reflects common industry usage. Visa processing and dispute rules change over time. Merchants should confirm current requirements with their acquirer or processor.
Related Reason Codes
Sources and Review Information
- Visa: Visa Merchant Dispute Management Guidelines
- Visa: Visa Core Rules and Visa Product and Service Rules
Last reviewed July 17, 2026
Chargeback rules, evidence requirements, and response options may vary by card network, region, processor, and dispute circumstances.