12.4

Visa Reason Code 12.4: Incorrect Account Number

A 12.4 dispute says you ran the sale on the wrong card number. Here is what that means, when it is fair, and how to answer it.

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Visa reason code 12.4 is called Incorrect Account Number. It is a processing error claim. The cardholder's bank says you ran the sale on the wrong card number. Visa calls the card number a Payment Credential. The sale went through, but it went through on an account that did not belong to the buyer. The cardholder sees a charge they do not recognize and asks their bank to send it back. A Visa dispute is how a card issuer sends a contested transaction back. If the dispute is valid, the acquirer takes the disputed amount from your merchant account and tells you. You can accept it. Or you can reject it by sending supporting documents to your card processor. Each step has a set time limit, so a late answer can lose the case. If you are new to these notices, start with how to read a chargeback notice. It shows you where to find the code on the paperwork.

What is Visa reason code 12.4?

Visa sorts disputes into four categories: 10 Fraud, 11 Authorization, 12 Processing Errors and 13 Consumer Disputes. Code 12.4 is in Category 12, Processing Errors. That group covers mistakes made while handling the sale, not claims of fraud or claims about the product. Under 12.4, the claim is narrow. The transaction was processed using the wrong card number. Nothing is said about the goods or the service. The claim is only about which account was billed.

Common causes of a 12.4 chargeback

These disputes often start with manual entry. A clerk types the card number by hand and slips on a digit. The sale clears anyway, because the wrong number belongs to a real account. Other causes include:

  • A card number copied from an old invoice or a paper form, with one digit wrong.
  • Two customer files mixed up, so one buyer is billed on another buyer's card.
  • A keyed entry where the number was read back wrong over the phone.
  • A terminal or file that sent a stale number from a saved profile after the card was replaced.

Most of these come down to human error at the point of entry. The card itself was present and good. The number attached to the sale was simply not the right one.

How to defend against a 12.4 dispute

Your proof must answer the exact claim in the code. The claim is that the wrong account was billed. So show that the account billed was the account the cardholder used. Useful documents include:

  • The transaction record showing the card number that was authorized and processed.
  • An authorization record for that same number.
  • A signed receipt or order form with the card number the buyer gave you.
  • Delivery or service records tied to that buyer and that sale.

If the number on your records matches the number on the dispute, say so plainly and attach the records. Visa dispute evidence must be easy to read and in English, or come with an English translation. A good reply explains the documents, addresses the specific dispute reason and describes the steps taken to resolve it. A delivery record alone does not answer this code. The dispute is about the account number, so lead with the number.

When a 12.4 dispute is invalid

There is one clear case where this dispute does not hold. A 12.4 dispute is invalid for a card number with no card issued, if an Imprint or an Authorization was obtained. Say the number you ran has no issued card. Say you have an imprint or an authorization on file. Then the claim fails. Check for that first. If it applies, your reply is short. State the condition. Attach the imprint or authorization record. Note that no card was issued for that number.

Step-by-step response process

  1. Read the notice and confirm the code is 12.4. Confirm the amount and the sale date.
  2. Pull your records for that sale. Start with the number as processed.
  3. Check the invalid case above. If it applies, build your reply around it.
  4. If it does not apply, assemble proof that the billed account matches the cardholder's account.
  5. Send the Dispute Response to your acquirer before the deadline. An acquirer may respond only once to the original Visa dispute. So make that one response count. The acquirer may send a Dispute Response. That is unless you already accepted the dispute through Rapid Dispute Resolution.
  6. Keep a copy of everything you sent.

Your reply may not be the end. In pre-Arbitration, the issuer must deal with the evidence the acquirer gave in its Dispute Response. After a Dispute Response, the issuer may switch dispute conditions only if the first condition was valid. See what happens after you answer a chargeback for the rounds that can follow.

Other codes in Category 12 cover other kinds of mistakes. 12.2, incorrect transaction code, is about the wrong transaction type. 12.3, incorrect currency, is about billing in the wrong money type. 12.5, incorrect amount, is about the wrong figure on the sale. 12.6, duplicate processing or paid by other means, covers a charge run twice or settled elsewhere. 12.7, invalid data, covers a sale sent with bad or missing data fields. If your notice shows one of those codes instead, open its page and match your proof to that claim.

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