Matching result or advice condition	Required handling
Original 0100 / A authorization found	Match the advice to the original authorization and update block, balance, ledger, or reconciliation records based on the advice details.
Original 0100 / A authorization not found	Store the advice as unmatched and process it according to your reconciliation or exception-handling rules.
Advice indicates approval	Replace or update the existing block for the transaction using the amount in the advice, when applicable.
Advice indicates decline	Remove the related block for the transaction, when applicable.
Advice relates to a credit	Apply your internal credit-handling rules. Your system may choose not to change blocks for credit scenarios.
Advice already processed	Do not apply balance, block, reserve, or ledger impact again. Return the same logical acknowledgement.