1. Bank cards are frozen for four reasons, as follows:

(1) Abnormal transaction occurred, which may be frozen by the bank;

(2) If the overdraft exceeds the share, the bank will immediately freeze the bank card;

(3) Enter the password three times in a row, and freeze and thaw automatically after 24 hours;

(4) The bank card is frozen for reasons of a third party.

2. Legal basis: Article 243rd of the Procedures for Handling Criminal Cases by Public Security Organs.

The time limit for freezing deposits, remittances, securities trading settlement funds, futures deposits and other property is six months. The maximum period of each freeze shall not exceed six months.

For major and complicated cases, with the approval of the person in charge of the public security organ at or above the municipal level, the time limit for freezing deposits, remittances, securities trading settlement funds, futures deposits and other property can be one year. The maximum period of each freeze shall not exceed one year.

Article 246

For frozen bonds, stocks, fund shares and other properties, the parties concerned or their legal representatives or entrusted agents shall be informed of the right to apply for the sale.

The obligee's written application to sell frozen bonds, stocks, fund shares and other properties does not harm the interests of the state, victims and other obligees, and does not affect the normal progress of litigation. If the validity of frozen bills of exchange, promissory notes and checks is about to expire, they can be sold or sold according to law with the approval of the person in charge of the public security organ at or above the county level, and the proceeds will continue to be frozen in their corresponding bank accounts; If there is no corresponding bank account, the proceeds shall be deposited in a special account designated by the public security organ in the bank, and the parties concerned or their close relatives shall be informed in time.

2. How to unfreeze abnormal bank card transfer?

Bank card transfer is frozen abnormally, so it needs to be unfrozen at the counter. Details are as follows:

1. If the account balance is insufficient 100 yuan due to repeated incorrect password input, and it is frozen after long-term non-use, I will go to the bank to unseal it with my ID card and bank card;

2. If the case is frozen because of long-term arrears, you should find a bank to unfreeze it after paying off the arrears and closing the case.