1. If the credit card is stolen by a friend, his behavior is suspected of credit card fraud, and it is recommended to call the police;

2. If the credit card is used with the consent of the party concerned, then If it is a civil case, you should file a lawsuit in court to demand repayment.

3. Legal basis: Article 196 of the "Criminal Law" (revised in 1997). The crime of credit card fraud and theft falls under any of the following circumstances. If the amount of credit card fraud is relatively large, a five-year fine shall be imposed. to fixed-term imprisonment of not less than 10 years and not more than 10 years of fixed-term imprisonment or criminal detention, and to a fine of not less than 20,000 yuan but not more than 200,000 yuan; if the amount is huge or there are other serious circumstances, the sentence is to not less than five years but not more than 10 years of fixed-term imprisonment and a fine of not less than 50,000 yuan but not more than 500,000 yuan. fine; if the amount is particularly huge or there are other particularly serious circumstances, the offender shall be sentenced to fixed-term imprisonment of not less than ten years or life imprisonment, and shall also be fined not less than 50,000 yuan but not more than 500,000 yuan, or have property confiscated.