Why it happens
- The card number was typed wrong.
- The transaction was submitted without a valid authorization for that number.
Discover4753Processing error
Invalid Cardholder Number
The transaction was submitted with a card number that is not valid.
What to send to fight it
- The authorization record for the exact card number charged.
- The transaction record showing the number that was submitted.
- Proof the cardholder made the purchase, such as a receipt or delivery record.
How to prevent it
- Authorize every transaction and submit it with the same card number.
- Read cards or use stored tokens instead of typing numbers.
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
- AWAltered Amount
- 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
- 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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