The reasons for the sudden abnormality of bank cards are as follows: 1, one person has multiple accounts, that is, one person has four first-class cards in a bank, so the account function will be adjusted to only accept and not pay, and users need to go to the counter to check before they can cancel. 2. It may be because the bank card is in the state of loss reporting, and the state is abnormal after loss reporting. Users can cancel the loss reporting at mobile banking or any bank counter. 3. It may be that the user has not performed real-name authentication or the identity information has not been updated. At this time, I need to go to the bank to verify the update before I can use it normally. 4. If there is no transaction in the new user 180 or the bank card is not used for a long time, the counter business will be suspended. I need to cancel at the counter at this time. Some banks can use mobile banking. For specific operation, you can consult the customer service of mobile banking or call "manual customer service". 5. It may be the account involved, and the business of the account involved will be terminated. Users need to verify their identity at any outlet within 3 natural days after receiving the notice.