Black account refers to the failure to repay the credit card more than twice before the repayment date after the credit card is overdrawn. Credit card customers who cause bank collection. Such customers will be recorded in the personal credit information system of the People's Bank of China, called bad credit records, and kept for 5 years. People who have two or more bad credit records in the personal credit information system will not be able to borrow, guarantee or apply for credit cards in various financial institutions, including housing mortgage loans, within five years.

Legal objectivity:

Article 36 of the Commercial Bank Law: The borrower shall provide a guarantee for the loan of a commercial bank. Commercial banks should strictly examine the repayment ability of guarantors, the ownership and value of collateral, and the feasibility of realizing collateral. After examination and evaluation by a commercial bank, it is confirmed that the borrower has a good credit standing and can repay the loan, and no guarantee may be provided.