Amex Reason Code A08: Authorization Approval Expired

What Amex reason code A08 means

A08 means you captured too late. An American Express authorization approval is valid only for a limited period. If you submit the charge after that period ends, the approval no longer counts, and Amex can charge the transaction back under A08 even if it was originally approved.

The validity window depends on your industry and how the sale is processed. Industry sources commonly cite about seven days for many card-not-present sales, with longer periods for categories like lodging and vehicle rental. Because the rules vary by market and merchant category, confirm the windows that apply to you with your acquirer or the current American Express Merchant Regulations.

A08 is related to, but different from, P07 Late Submission. A08 is about the authorization expiring before capture. P07 is about submitting the charge outside Amex’s submission timeframe.

Common causes

• Preorders and backorders captured when the item finally ships, weeks after checkout
• Made-to-order or personalized items with long production times
• Split shipments where later items are captured against the original approval
• Capture jobs that fail and retry days later
• Holding orders for fraud review longer than the authorization lasts

Evidence that wins an A08 dispute

1. Authorization record: approval code and timestamp.
2. Submission record: the date the charge was submitted, showing it fell inside the validity window for your category.
3. Re-authorization: if you re-authorized before capture, the new approval code and date.
4. Merchant category: if your industry has a longer validity period, your MCC and the applicable rule.

A preorder example

An order for a backordered item is authorized at checkout on March 1. The item arrives from the supplier on March 20, and the warehouse ships and captures that day against the March 1 approval. If the approval was valid for about a week in your category, the capture came well after it expired. Re-authorizing on March 20, or charging when the item is ready to ship, avoids the problem.

How to prevent A08 disputes

• Capture at shipment, and ship within the authorization window where possible.
• For preorders, re-authorize the stored card (with the customer’s consent) before capture.
• Monitor capture jobs for failures and alert on anything older than a few days.
• On long fraud reviews, re-authorize before capture if the review runs past the window.

Should you fight or accept?

Fight when your records show the charge was submitted while the approval was valid, or you re-authorized before capture.

Accept when you captured against an expired approval. Then fix the capture timing; A08s on preorders are almost entirely preventable.