Reason Code 4834Transaction Amount Differs

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Card Issuer


Reason Code



Interaction Error


This reason code is transitioning from the legacy code 4831. The cardholder claims the transaction amount on the receipt differs from what the cardholder was charged.


The merchant: 

  • Made a math error during calculations.
  • Altered transaction amounts after processing without the cardholder's consent.
  • Sent a batch of transactions more than once.


Cardholders and issuers have 90 days to file a dispute related to the claim against the merchant.

Merchants have 45 days to respond to the claim in dispute.

Steps to Prevention

  • Always check with the cardholder before changing the completed transaction amount.
  • Be careful when entering transaction data.
  • Void a transaction if the cardholder wants to use an alternate payment method.
  • Double-check final transaction amounts before processing them.
Mastercard Merchant Official Documentation
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