1. The reasons why bank card transactions have been restricted due to abnormal bank card transactions are as follows:

1. If the bank detects that there is a risk in the credit card, it determines that the card transactions are restricted due to abnormal credit card transactions. Users only need to call the customer service number and contact bank staff to prove that they are using the credit card to remove the restriction.

2. If the transaction limit is caused by the credit card limit, the user can log in to the bank's website to modify or cancel the transaction limit, and then normal use can be restored.

3. If the equipment failure prevents transactions, just replace the POS machine.

2. Why is the bank card abnormal?

Bank cards are closely related to each user’s property security. In order to better protect users’ property security, banks will specially set up a corresponding credit card protection system to determine whether the behavior is illegal by detecting various transaction data. abnormal. If the bank determines that there is abnormal behavior, it will temporarily restrict the use of the credit card and issue a notification to the user that a risk in the credit card is detected to protect the user's property security. If a user frequently uses a credit card to make large transactions in the same place, the bank's risk control system will consider that the user has a credit abnormality, determine that the user is engaging in cash-out behavior, and impose transaction restrictions.

3. Bank card transactions are restricted, which means that the use and transactions of bank cards, such as transfers, payments and other operations are restricted. Bank card transaction limit refers to the bank's limit on the amount of a user's expenditure in a single transaction or the total maximum expenditure amount per month. When a cardholder uses a bank card for payment or transaction, the bank usually has a limit setting for the initial fund transaction amount, and the user can also change it himself. In simple terms, bank card transaction restrictions mean that there is an upper limit on the amount of a single transaction per day, and there is also an upper limit on the transaction amount per month. It does not mean that the funds in the bank card can be consumed or traded without limit. The purpose of this setting is to consider the safety of users' funds and ensure the safety of cardholders' funds. When a user has a large amount of funds flowing out, it serves as a reminder to the user and improves the user's card security. This type of business usually exists in bound third-party payment platforms.