Generally speaking, the credit card pre-authorization period is 30 days. Within 30 days after the pre-authorization, if the customer fails to settle the account, the pre-authorization will be cancelled. \ x0d \ x0d \ Credit card pre-authorization is a means used by special merchants as a guarantee for funds. After the cardholder has finished spending, he can cancel the pre-authorization of the credit card, and the credit card amount will be restored after the pre-authorization of the credit card is cancelled. \ x0d \ x0d \ When a pre-authorization transaction occurs, the cardholder can check the pre-authorization status of the credit card at any time through the customer service phone number of the issuing bank or by logging in to the online bank. Pre-authorization of credit card refers to the transaction that the card issuer or its agent confirms that the credit limit is allowed to be frozen before the deduction of the special merchant, and the pre-authorization will occupy the credit limit of the card. The pre-authorization will be cancelled if the customer settles the pre-authorization, and it will be cancelled if the customer fails to settle the pre-authorization within 30 days after the pre-authorization occurs.