American Express reason code
American Express reason code P05: Incorrect Charge Amount
The amount billed differs from the amount authorised or agreed.
Network: American ExpressCategory: Processing ErrorResponse window: ~20 days
What Amex P05 means
American Express P05 is an incorrect charge amount: the amount billed differs from the amount authorised or agreed.
When issuers use it
Amex raises P05 when the settled amount does not match the agreed amount.
Mistakes that lose this dispute
- Charging a different amount than quoted without approval
- Having no written agreement on the price
FAQ
Frequently asked questions
The customer disputes the amount charged. What now?
Show the agreed price in the signed agreement or approved invoice. If you charged what was agreed, the dispute does not hold.
We changed the price mid-project. How do I defend it?
Keep the client's written approval of the revised amount; that approval is what defends the charge.