Pre-authorization of credit card refers to the transaction in which the card issuer or its agent confirms that the license is frozen before the special merchant deducts money. Pre-authorization will occupy the credit line of the card. When the customer settles the pre-authorization, the pre-authorization will be cancelled. Within 3 days of the pre-authorization, if the customer fails to settle the account, the pre-authorization will be cancelled.

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

Pre-authorization transaction only controls the amount of available months for cardholders. Complete the fund settlement by pre-authorization. An approved pre-authorized transaction is only valid for a limited time.

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.