When handling a credit card, will the salesman call my unit and family to verify the information?
It's possible. This is part of the bank audit process. Just check some contact information you filled in when you applied for a credit card. Generally, what you ask is address, telephone number, ID number, position, contact person, family member, etc. Companies and families. As long as the answer is consistent with the information filled in the application form, it will be passed.