Why it happens
- The amount was changed after the cardholder approved it.
- The amount submitted differs from the authorized amount.
DiscoverAWProcessing error
Altered Amount
The cardholder says the amount charged is different from the amount they agreed to.
What to send to fight it
- The receipt or order showing the amount the cardholder agreed to.
- The authorization record with the same amount.
- Terms that allowed the final amount, such as a tip or usage charge.
How to prevent it
- Settle for the amount the cardholder approved.
- Authorize again when the amount changes.
Summaries written by NoChurn from the networks’ public rules and processor documentation. Networks update their rules and deadlines depend on your processor: check its documentation before you respond.
Other Discover codes
- AADoes Not Recognize
- APCancelled Recurring Transaction
- CDCredit/Debit Posted Incorrectly
- DPDuplicate Processing
- ICIllegible Sales Data
- NFNon-Receipt of Cash from ATM
- PMPaid by Other Means
- RGNon-Receipt of Goods, Services, or Cash
- RMQuality Discrepancy
- RN2Credit Not Received
- UA01Fraud - Card Present Transaction
- UA02Fraud - Card Not Present Transaction
- UA05Fraud - Chip Counterfeit Transaction
- UA06Fraud - Chip and PIN Transaction
- 4534Duplicate Processing
- 4537Fraud - Card Present Transaction
- 4542Late Presentation
- 4550Credit/Debit Posted Incorrectly
- 4553Cardholder Disputes Quality of Goods or Services
- 4586Altered Amount
- 4752Does Not Recognize
- 4753Invalid Cardholder Number
- 4755Non-Receipt of Goods or Services
- 4863Authorization Non-Compliance
- 4864Non-Receipt of Cash from ATM
- 4865Paid by Other Means
- 4866Fraud - Chip Card Counterfeit Transaction
- 4867Fraud - Chip Card and PIN Transaction
- 4868Fraud - Card Not Present Transaction
Sources (2)
- TabaPay Docs: Discover chargeback reason codes · checked 2026-11-09
- Antom (Alipay) Docs: Discover/Diners dispute reason codes · checked 2026-11-09
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