：
Because the credit card application is approved by post, there is no guarantee that the recipient is the applicant. In order to protect applicants and banks from being stolen, credit cards have card opening procedures before they are officially opened. Card opening is mainly through telephone or internet. , check the relevant personal information provided at the time of application, and go through the card opening procedures after meeting the requirements. At this time, the applicant becomes the cardholder and can officially start using it after signing on the back of the card. After a credit card is opened, it is generally necessary to set a password for the card. After accepting a credit card, a credit card merchant or bank shall review the validity of the credit card and the identity of the cardholder.
On the card face of a credit card, there are at least the following information: front: name and logo of the issuing bank, credit card type (organization logo) and holographic anti-counterfeiting logo, card number, English or pinyin name, activation date (generally calculated to month) and validity period (generally calculated to month). Chip account and card magnetic stripe account are two relatively independent accounts. Back: the magnetic stripe of the card, the cardholder's signature column (which must be signed after activation), the service hotline, the four or all digits after the card number (to prevent fraudulent use), and the credit card security code (the three digits immediately after the signature column on the back of the credit card are used for credit card activation, password management, TV, telephone and online transactions, etc. ). The merchant and the bank confirm that the credit card is valid and contact the bank for authorization according to the contract signed with the issuing bank. Authorization is the amount that can be used to further prove the identity of the cardholder. Authorization is generally carried out when the usage specified in the contract is exceeded. After receiving the authorization notice, the issuing bank will issue an authorization instruction according to the balance of the cardholder's deposit account and the agreement that the bank allows overdraft, and reply whether to agree to the transaction. Credit cards are usually only used by the cardholder himself, and lending them to others is generally a violation of the use contract. Before the credit card is cancelled, the account balance must be settled, and the whole process of card cancellation must be completed within 45 days after the application.