When the amount deposited in the credit card exceeds all the debts under the account, the extra money is called "overpayment", which will be automatically deducted from the credit card consumption. Cardholders can also call the bank's credit card service hotline to collect the overpayment by transferring money to their debit cards. The account name and certificate number of the debit card used must be the same as that of the credit card.

2. Credit card

A credit card, also known as a debit card, is a credit certificate issued by a commercial bank or credit card company to a consumer with qualified credit. It is in the form of a card with the name, expiration date, number and cardholder's name printed on the front, and a magnetic stripe and signature strip on the back. Consumers with credit cards can go to special commercial service departments for shopping or spending, and then the bank will settle accounts with merchants and cardholders, and cardholders can overdraw within the prescribed limit.

from January 1, 221, the credit card overdraft interest rate will be determined by the card issuer and the cardholder through independent negotiation, and the upper and lower limit management of the credit card overdraft interest rate will be cancelled (the original upper limit is .7 times of the daily interest rate, and the lower limit is .7 times of the daily interest rate).

3. repayment method of credit card

1. repayment in the issuing bank

this method includes: the counter of the issuing bank, ATM, online banking, automatic transfer, telephone banking and so on. After repayment, the credit card limit will be restored immediately, and the money will generally be recorded after being processed by the system on the same day.

2. Micro-banking POS mobile phone

Micro-banking POS mobile phone is a personal payment terminal in the mobile financial system, which can be used for direct credit card repayment, transfer and other services, and immediately arrive at the account.

3. Transfer/remittance repayment

There are two ways: inter-bank in the same city and inter-bank in different places. No matter how to transfer or remit money, the remitting bank will charge a certain fee, and at the same time, the time of payment and the convenience of repayment are not as good as those in peers, online repayment and convenience store repayment.

4. Online repayment

The common online platforms in China are UnionPay Online, Kuaiqian, Shengfutong, Alipay and Tenpay. Different platforms and banks are selected, and the charging standards and specific payment arrival time are different.

5. Repayment by Xinfutong

The "Xinfutong" smart credit card phone is an innovative electronic product independently developed by China UnionPay, certified by the Bank Card Testing Center and supported by financial services provided by China UnionPay's inter-bank information exchange network.