Reason code

American Express reason code P08 is used when a cardholder claims they were charged more than once for the same transaction. This could be due to a technical glitch, a mistakenly repeated authorization, or human error at the point of sale.

Often, the cardholder doesn’t realize that the second charge was for a different item or service, or that one of the charges was later reversed. These disputes can typically be resolved with clear transaction documentation and a review of the merchant’s billing records.

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If the charge was not a duplicate, provide proof that each transaction was legitimate and distinct:

• Submit separate receipts, invoices, or order confirmations for each charge
  
  
• Include timestamps or transaction IDs to show they were not processed in error
  
  

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Prevent duplicate charge disputes by verifying every transaction before submission:

• Use POS systems with duplicate detection safeguards or alerts
  
  
• Train staff to double-check card activity during reattempts or system errors
  
  

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