Mastercard Reason Code 4808

What is

A general catch-all for authorization problems — expired, invalid, or improperly obtained authorization.

The transaction's authorization doesn't meet Mastercard's requirements — expired, declined, or never actually obtained.

Usually a processing/gateway issue; your authorization logs are the entire case.

Your gateway's authorization request/response log for the exact transaction.

Submit the full authorization log showing a valid, timely approval was obtained.

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Not retaining authorization logs long enough to respond to a dispute filed weeks or months later.

Retain authorization logs for at least as long as your chargeback window allows disputes.