Credit cards are generally repaid once a month, but there is a 3-day grace period after the credit card repayment date. Paying off the balance during the grace period is the same as repaying the debt within the normal time. , credit card holders do not need to pay late fees.

Since the card is sent by mail after the credit card application is approved, there is no guarantee that the recipient is the applicant. In order to protect applicants and banks from fraud losses, the credit card has set up a card opening procedure before it is officially launched.

Card opening is mainly done by phone or online. The relevant personal information provided during the application is checked. Once the card is met, the card opening process is completed. At this point, the applicant becomes the card holder and can officially start using it after signing on the back of the card. After opening a credit card, you generally need to set up a password for the card.

After accepting a credit card, a credit card merchant or bank must review the validity of the credit card and the identity of the cardholder.

The credit card must have at least the following information on the front: name and logo of the issuing bank, credit card number (organization logo) and holographic anti-counterfeiting mark, card number, name in English or Pinyin, activation date (usually calculated to months) , Validity date (generally calculated to month), the latest issued card is equipped with a chip on the front, and the chip account and the card magnetic stripe account are two relatively independent accounts.

Back: Card magnetic stripe, cardholder signature field (must sign after activation), service hotline number, last four digits of the card number or the entire card number (to prevent fraudulent use), credit card security code (on the credit card On the signature line on the back, there are three digits immediately following the last four digits of the card number, which are used for credit card activation, password management, TV, telephone and online transactions, etc.).

The merchant and bank confirm that the credit card is valid, and contact the bank to request authorization according to the contract signed with the card issuer. Authorization is to further confirm the cardholder's identity and the amount that can be used. Authorization is generally made when the usage amount specified in the contract is exceeded.

After receiving the authorization notice, the card-issuing bank will issue an authorization instruction based on the deposit balance of the cardholder's deposit account and the bank's agreement to allow overdraft, and reply whether it agrees to conduct the transaction.

Repayment methods include: card issuing bank counter, ATM, online banking, automatic transfer, telephone banking repayment, etc. After repayment, the credit card limit will be restored immediately, and the payment will generally be credited to the account after the system processes it on the same day.