The cardholder was charged a different amount than what was authorized or agreed to.
A pricing, tax, tip, or currency-rounding error caused the settled amount to differ from the authorized amount.
Common with tip adjustments, partial shipments, or promo-code bugs that change price after authorization.
Order record showing the exact amount the customer agreed to pay, matched against what was authorized and settled.
Submit the order and authorization records showing the charged amount matches what the customer agreed to.
Adjusting an order's total after authorization without re-authorizing the new amount.
Re-run authorization whenever an order total changes after the initial auth.
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