Banks generally do not disclose the address books of overdue credit card borrowers. The following are detailed instructions:

1. Protect customer privacy: As a financial institution, banks are responsible for protecting customers' privacy and personal information, including address books. According to the "Personal Information Protection Law of the People's Republic of China", banks are obliged to keep customers' personal information confidential and shall not disclose or leak it to others in any way.

2. Internal bank regulations: The bank has relevant internal rules and regulations to restrict bank employees from leaking customer address book information. Employees are obliged to sign confidentiality agreements and receive relevant training on the importance of protecting customer privacy.

3. Legal constraints: Chinese law clearly stipulates the protection of personal information and strengthens penalties for violations. As an industry participant, banks must comply with effective laws and regulations to protect the security of customers' personal information.

Summary: In the case of overdue credit card repayment, the bank will not disclose or disclose the borrower's address book information. Banks have the responsibility to protect customer privacy and are bound by relevant internal rules, laws and regulations.

Extended information: According to the Personal Information Protection Law of the People's Republic of China, personal information refers to various information related to specific individuals recorded electronically or by other means. This information includes but is not limited to name, ID number, phone number, address, etc. The protection of personal information is an important legal system designed to protect personal privacy and safeguard the legitimate rights and interests of citizens.

The above is the answer based on the laws of the People's Republic of China and the common practices of the banking industry. The bank will strictly abide by relevant laws and regulations to protect customers' personal information security and privacy rights. But if the prerequisites of the question change, the answer may be different.