Scenario	Required handling
Matching authorization found	Match the presentment to the original authorization, release or adjust the related block, and post or reconcile the transaction.
No matching authorization found	Treat as unmatched or offline presentment and process according to your reconciliation or exception-handling rules.
Presentment amount equals authorized amount	Release the related block and post the final amount according to your ledger rules.
Presentment amount is lower than authorized amount	Release the remaining unused blocked amount and post the final presentment amount.
Presentment amount is higher than authorized amount	Post or reconcile the final amount according to your internal rules and investigate or exception-handle any difference if required.
Refund or credit-to-cardholder	Apply your internal refund or credit-handling rules.
Duplicate presentment	Do not post, release, or adjust funds again. Return the same logical acknowledgement.