The bank card suddenly received money from Unicom.

There are three main reasons: information leakage, account association and bank card theft.

1. Information leakage: Personal account information is leaked, mainly information such as verification code, so don't send it to others casually.

2. Account association: Your personal account is associated with third-party payment institutions and online shopping websites, such as WeChat, Alipay and Taobao. As long as there is a transaction, you will suddenly receive money.

3. The bank card is stolen: if someone else pays by credit card, please call to report the loss first, and then go to the counter to check the specific situation.