The main purpose of credit card door-to-door forensic investigation is to collect evidence, but banks do not have the right to door-to-door evidence collection. Door-to-door evidence collection is carried out by the public security organs. This situation is a civil dispute arising from non-payment of credit card debt, but there is no need to bear criminal liability. Generally, banks will sue credit card users, and then the court will notify the users to repay the money, and will not come to collect evidence. However, it should be noted that if a bank sues a credit card holder, but the bank cannot collect evidence through legal channels due to objective reasons, the bank will apply to the court to investigate and collect evidence, or even come to collect evidence. However, if your credit card expires, your mobile phone number is changed, or even the bank loses contact directly and cannot find you, and if it cannot contact you, it may go to your place of household registration, which is your village committee, to verify your situation. .

Legal basis: Article 94 of the "Interpretation of the Supreme People's Court on Application" stipulates in the second paragraph of Article 64 of the Civil Procedure Law that the parties and their litigation agents are unable to collect on their own due to objective reasons Evidence includes:

(1) The evidence is kept by the relevant state departments, and the parties and their litigation representatives have no right to inspect and retrieve it;

(2) It involves state secrets, commercial secrets or Personal privacy;

(3) Other evidence that the parties and their litigation representatives cannot collect on their own due to objective reasons.

If the parties and their litigation agents are unable to collect evidence on their own due to objective reasons, they may apply in writing to the People's Court for investigation and collection before the expiration of the time limit for producing evidence.