American Express Reason Code P05

What is

American Express Reason Code P05

?

The cardmember was charged a different amount than agreed.

Why this happens

A pricing, tax, or adjustment error caused the settled amount to differ from what the customer agreed to pay.

What this means for each merchant

Your order record proving the agreed amount is the whole defense here.

Evidence that typicalls wins this

Order record showing the agreed amount matched against what was authorized and settled.

How to fight it

Submit order and authorization records showing the charged amount matches what was agreed.

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Common mistakes

Adjusting an order total after authorization without re-authorizing.

How to prevent it

Re-authorize whenever an order total changes after initial authorization.

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