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Credit card pre-authorization is generally used to pay the deposit, that is, a part of the available credit card is frozen as the deposit. The process of pre-authorization is similar to manual bill pressing, but the content of the phone call is to ask for the pre-authorization of the corresponding amount, not to ask for money or to press the bill, but to issue a deposit receipt certificate. General pre-authorization will be cancelled by the merchant at the time of checkout. If the merchant forgets to cancel, he can call the merchant to ask for cancellation, but he can't call the authorized institution to cancel himself. Or, wait for the bank to automatically cancel the pre-authorization (usually ranging from 7 to 30 days).
In addition, there are manual sheets that are usually used without POS machines and networking. The pressing operation must have a pressure-sensitive copy of the Direct Purchase Order (at least two copies) and a telephone. The inspection before pressing the order is the same as that of the POS machine. Then, the operator prints the card number, name, etc. Note the credit card on the purchase order with a card press, and write down the amount, date and other information, then call the authorization hotline of the acquiring bank, report the card information to apply for authorization, write the obtained authorization code on the purchase order, and the cardholder will sign it after confirming it is correct. After checking the signature, the operator gives the cardholder a copy of the credit card and the order form. At this point, the manual pressing procedure is completed. Authorized calls are usually made immediately. In some areas with poor communication or good credit discipline, merchants will encounter the situation that they will deliver the goods after signing the card to complete the transaction. Authorization will be completed in the future, but the merchant is at risk of credit card fraud (if the customer pays with an invalid card and does not apply for an authorization code immediately, it will not be discovered immediately). From the cardholder's point of view, online payment is considered to be one of the most risky payment methods for credit cards, because malicious people may steal user information by means of phishing, eavesdropping on network information, impersonating payment gateway and so on. When paying online, you need to enter the card number and the validity period of the credit card. With the development of the Internet, the security of online payment and credit card payment has gradually improved, which has also blown up the trend of online consumption.