Usually, manual pressure tablets are used without POS machines or networking. The pressing operation must have a pressure-sensitive copy of the Direct Purchase Order (at least two copies) and a telephone. Check before pressing the bill (judging whether the information on the card is valid first, and then look through the blacklist of bank card numbers provided by the bank that is thicker than the yellow pages regularly to see if it is on the list. If you still feel uneasy, the cashier will call the acquiring bank for authorization, and then look at the ID card or something. 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).