Definition of credit card Credit card is a special carrier card issued by commercial banks to individuals and units, which can be used for shopping, consumption and cash withdrawal from banks. In the form of a card, the name of the issuing bank, the expiration date, the number and the name of the cardholder are printed on the front, and the magnetic stripe and signature strip are printed on the back. Credit cards are divided into credit cards and quasi-credit cards according to whether the reserve funds are deposited in the issuing bank. Credit card is a credit card that the issuing bank gives the cardholder a certain credit limit, and the cardholder can spend first and then repay. Quasi-credit card is a credit card that deposits a certain amount of reserve money according to the requirements of the issuing bank. The credit card we are talking about now generally only refers to the debit card. The most popular saying is that when your shopping demand exceeds your ability to pay, you can borrow money from the bank. A credit card is a certificate that the bank promises to lend you money according to your credit status. Your credit card will remind you how much money you can borrow from the bank and when to pay it back. Credit cards will also record your personal data and consumption details, thus providing you with all-round financial services. From the appearance, the credit card is the size of an ID card, generally made of special plastic, with specially designed patterns, the name and logo of the card issuer printed on the front, and the card number, cardholder's name, expiration date and other information printed in a convex or flat way; On the back of the card, there is a magnetic stripe for recording relevant information, a signature strip for the cardholder's signature and a description of the card issuer. It is a consumer payment tool and the most popular plastic currency after cash at present. A certificate issued by a bank or company that the holder has a good reputation and can keep accounts at a designated store or place, with a credit certificate. Ordinary credit cards, such as identity cards, are generally made of special plastic, and the cardholder's name, number and expiration date are printed on the credit card with raised letters. In order to prevent fraudulent use, in recent years, some credit cards have pictures of cardholders printed on them. When the customer checks out, he only needs to hand in the credit card to the store, and the cashier will put the credit card on the stamping machine for stamping, and those raised words will be printed on the triple document, and then the cardholder will sign the document. After checking that the signature on the document is consistent with the signature pattern on the credit card, the cashier in the store will identify the charge-to-account consumption, and the cardholder can buy the required goods without paying cash. Credit card holders can not only buy all kinds of goods, eat, entertain and stay in special merchants, but also overdraw a certain amount of cash in the bank designated by the card issuer. Special merchants and designated accepting banks collect money from the card issuer with the bill signed by the cardholder, and then the card issuer sends it to the cardholder for verification and payment within the prescribed time limit. When the cardholder pays off, the card issuer will charge interest on the overdraft as required. If you don't pay at the due date, you will be charged a penalty interest.