If you don't sue your relatives for credit card fraud, the bank will sue you for credit card fraud. In other words, you take the fall for him.
Related knowledge:
Stealing someone else's credit card belongs to the category of credit card fraud, which is one of the financial fraud crimes stipulated in our criminal law. Among them, credit card fraud accounts for about 60% of the total financial fraud cases.
Article 196 of the Criminal Law lists several situations that constitute the crime of credit card fraud, including the act of "fraudulently using another person's credit card".
Stealing another person's credit card and using it in the name of the cardholder without the consent or authorization of the cardholder is a typical "fraudulent use of another person's credit card".