American Express reason code
American Express reason code P08: Duplicate Charge
The Card Member was billed more than once for the same transaction.
Network: American ExpressCategory: Processing ErrorResponse window: ~20 days
What Amex P08 means
American Express P08 is a duplicate charge: the Card Member was billed more than once for the same transaction.
When issuers use it
Amex files P08 when multiple charges appear for a single purchase.
Mistakes that lose this dispute
- Billing the same invoice twice
- Keeping no transaction IDs to distinguish charges
FAQ
Frequently asked questions
The customer says they were charged twice. What do I do?
If the charges are for different services, show the separate invoices and transaction IDs. If it was a genuine duplicate, refund it rather than fight it.
How do I prevent duplicate charges?
Use unique invoice and transaction references, and reconcile settlements so the same charge is never captured twice.