P22

Amex Reason Code P22: Non-matching Card Number

P22 means the card number you charged does not match the one that was approved. Here is why it happens and what to send.

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American Express
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Amex reason code P22 stands for Non-matching Card Number. It means the card number you sent for the charge does not match the card used for the approval. The sale went through, but the numbers do not line up, so American Express takes a second look.

What is Amex reason code P22?

P22 is an American Express dispute code. It appears when the card number on the charge and the card number on the approval are different. A disputed charge is first worked on with the Card Member before the merchant is contacted. If more information is needed, the merchant receives either an Inquiry or a Chargeback.

You get an Inquiry when a Card Member disputes a charge, and the papers on file do not settle it. If the Card Member gives enough facts, the money may be taken from your account right away. If your reply settles the dispute on time, there is no Chargeback.

Common causes of a P22 chargeback

A P22 chargeback happens when two card numbers that should match do not. Some common causes:

  • A clerk keyed in the wrong digits for a card-present sale.
  • Two cards from the same customer got mixed up, and the charge went on the wrong one.
  • A terminal or plugin sent an old or saved card number instead of the one just approved.
  • A refund or repeat billing was run on a card that was never approved for that sale.

Most P22 cases come from human error, not fraud. That matters, because the fix is usually a paperwork fix, not a fight over who bought what.

How to prevent P22 chargebacks

Prevention is about making sure the number you charge is the number you approved.

  • Swipe, dip or tap the card instead of keying it in whenever the card is present.
  • If a clerk types the card number, check it against the card before you run the sale.
  • Keep your terminal software current, so it does not send stale stored numbers.
  • For repeat billing, check the card on file before each charge. When a customer gives you a new card, delete the old one.

If you take cards in person, train staff to check the receipt first. Only then should they hand the card back. That habit catches most mismatches at the counter.

How to respond to a P22 chargeback

After a Chargeback, you can send papers that may undo it. If your reply answers the dispute and arrives on time, the Chargeback is undone. If you do not reply in time, or you do not send the requested documents, the Chargeback stands.

For P22, the proof is the card record itself. You can send a copy of the card imprint or the terminal's charge record showing the card number. Include a copy of the charge record or credit record with your papers.

A good reply explains the documents. It also states the reason for the dispute and the steps you took to fix it. Keep it short and label each page so the reader knows what it shows. The best way to respond is online through your Merchant Account.

If the case moves past your first reply, the steps that follow are the same as any other Amex dispute. To see what happens after you send your proof, read what happens after you answer a chargeback.

P22 is not the only Amex code about card numbers, and the difference matters for what proof you send.

P01, Unassigned Card Number, means the card number does not exist or was never issued. P22 means the card is real, but the number you charged is not the number you approved. With P01 the card itself is the problem. With P22 the match between approval and charge is the problem. See P01, Unassigned Card Number for that code.

P05, Incorrect Charge Amount, is about the dollar value, not the card number. The numbers matched fine, but the amount charged was wrong. See P05, Incorrect Charge Amount.

If you are not sure which code you are dealing with, start with the notice itself. Our guide on how to read a chargeback notice shows you where to find the code and what it says.

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