The following questions are usually asked:

The status of the card is abnormal, such as degaussing the card, inactivating the card, too many wrong password entries, expired card, etc. It is recommended to call the service hotline for confirmation.

There is nothing wrong with the card. The signal of POS machine is not good, and the card swiping will also fail if it is not connected to the Internet.

The card does not support transactions. For example, the single-logo credit cards launched by banks, such as World Cup Credit Card, Transformers 4 Credit Card and Olympic Dragon Card, do not support UnionPay transactions, so they cannot be used in POS machines issued by ICBC.

If you hold an IC chip credit card, because UnionPay has turned off the downgrade transaction function, if the cashier still carries out the transaction operation by swiping the card instead of inserting the card, it will not be available.

Extended data:

The consumption mode of using credit card is basically the same as that of using debit card, but there are some minor differences. When using a credit card, please follow the following methods:

1. When swiping your card, please don't put your credit card away from your sight to avoid misuse or theft;

2. Don't sign a blank or unfilled bill at will;

3. Before signing, please be sure to confirm whether the card number and amount listed in the bill are correct, and pay attention to whether the consumption currency and amount expressed in words and figures are correct;

When using a credit card, you must sign to confirm the consumption. Generally, you don't need to show your ID card or enter your password. However, please cooperate in the following situations:

Due to the operating standards, POS machines in some cities still need to enter passwords. Please enter 6 digits at will. If you spend a lot of money or buy goods that are easy to realize, it is recommended that you enter an accurate ATM private password.

5. When the transaction needs to be rewritten or cancelled due to the wrong signing, please ask the merchant to tear up all the original signing and keep the return voucher given by the merchant to avoid future disputes;

6. After signing the bill, please confirm that the credit card returned by the salesperson of the special merchant is indeed his own credit card;

7. After the transaction is completed, please keep the root contact of the signing cardholder for checking with the credit card statement sent by the bank.

References:

Baidu encyclopedia credit card swiping