Reason Code P05Incorrect Charge Amount

↩  Back to Directory


Card Issuer

American Express

Reason Code



Processing Error


The merchant processed a different amount from what they got authorization for/the cardholder agreed to.


  • The merchant made an error in calculating or entering the transaction amount.
  • The merchant altered the transaction amount by adding a tip or gratuity. 
  • The merchant switched the original transaction amount without the cardholder’s consent.


Cardholders and issuers have no limit to the number of days they have to to file a dispute related to the claim against the merchant.

Merchants have 20 days to respond to the claim in dispute.

Steps to Prevention

  • Always double-check the final transaction amount.
  • Never change the transaction amount without the cardholder's permission.
American Express Merchant Official Documentation
Sign up for our newsletter
2024 Justt Ltd. All rights reserved.