Pre-authorization only freezes the money, and there is no actual deduction. The real transaction will be completed when the pre-authorization is completed.

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

Pre-authorized transactions are used by the acceptor to grant transaction permission to the cardholder from the card issuer. The acceptor puts the estimated consumption amount into the transaction response and sends it to the card issuer. The amount is sent to the cardholder (the card issuer) as a pre-authorized amount. After approval, the card issuer will put the authorization number and other information into the transaction response and send it to the acceptor.

Pre-authorized transactions only control the cardholder’s available monthly limit. Funds settlement is completed by pre-authorization. An approved pre-authorized transaction is valid for a limited time only.