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Pre-authorization only freezes the money, without actual deduction. After the pre-authorization is completed, the real transaction is completed.

Pre-authorization transactions are divided into POS pre-authorization, POS pre-authorization addition, POS pre-authorization completion, POS pre-authorization cancellation and POS pre-authorization completion cancellation.

Pre-authorization transaction is used to accept the transaction permission of the card issuer to the cardholder. The receiver puts the estimated consumption into the transaction response and sends it to the card issuer. As a pre-authorized amount, the amount will be sent to the card issuer of the cardholder (card). After the issuer approves, it will put the authorization number and other information into the transaction response and send it to the accepting party.

Pre-authorization transactions only control the number of months available to cardholders. Complete fund settlement through pre-authorization. The approved pre-authorization transaction is only valid for a limited time.