The three numbers on the back of the credit card are the security code of the credit card, which can be seen on the back of the credit card. When the credit card is not with you, you can call the customer service hotline of the issuing bank and ask the customer service to check the security code for you. But the security code is very private information, and the customer service may not have the right to inquire.

Users can only check the 3-digit security code on the back by looking at the back of the credit card. There is no way to check this security code except by looking at the back of the credit card, even if you call the customer service hotline of the issuing bank. For users, just remember the 3-digit security code, and at the same time pay attention to keeping the credit card well, and don't disclose the relevant information of the security code.

1. Billing date: Billing date means that the bank summarizes and settles all transactions and expenses of the current credit card account every month, and calculates the current interest, total arrears and minimum repayment amount.

For example, if your checkout date is 20th, credit card transactions before 20th of each month will be included in this month's checkout, and transactions after 20th will be included in the next checkout cycle. The billing date is fixed, and the date of birth shown on the credit card application form (the date of birth is 29/30/3 1, and the system is randomly configured as 4-28). For more information, please refer to the bill prompt.

2. Last repayment date: the date when you paid off the current credit card balance for the last time. No interest will be paid before this date. If the last payment date is exceeded, interest will be calculated. So please remember the last payment date.

Credit card products can be divided into bank cards and non-bank cards according to different card issuers. This is a credit card issued by the bank. Cardholders can shop and spend money at the special merchants of the issuing bank, or they can withdraw cash at any time at the outlets of the issuing bank or at places with ATMs.

Non-bank card. This kind of card can be divided into retail credit card and travel entertainment card. Retail credit cards are credit cards issued by commercial organizations, such as department stores and oil companies, which are specially used for shopping in designated stores or filling gas stations. , and settle accounts regularly. Travel and entertainment card is a credit card issued by airlines, travel companies and other service industries, which is used for ticket purchase, dining, accommodation, entertainment and so on.