The police should be called immediately.

If you are defrauded of paying off a credit card for someone else, you should call the police immediately, provide all available clues to the public security organs, keep all items, information, contact information, etc. related to the case, and actively cooperate and assist the public security organs. The agency investigates the case.

The Criminal Law of Fraud stipulates: 1. Whoever commits this crime shall be sentenced to fixed-term imprisonment of not more than three years, criminal detention or surveillance, and shall also or solely be fined; 2. If the amount is huge or there are other serious circumstances, he shall be sentenced to three years' imprisonment. 3. 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 10 years or life imprisonment and shall also be fined or have property confiscated. According to the "Interpretations of the Supreme People's Court and the Supreme People's Procuratorate on Several Issues Concerning the Specific Application of Laws in Handling Criminal Cases of Fraud": Fraudulent public and private property worth 3,000 yuan to more than 10,000 yuan and 30,000 yuan to more than 100,000 yuan, 500,000 yuan If the amount exceeds RMB 10,000, it shall be deemed as "relatively large amount", "huge amount" and "especially huge amount" as stipulated in Article 266 of the Criminal Law.