According to the specific circumstances, as far as possible to save evidence to prove fraud, such as mobile phone transfer records, IOUs or related chat records. Then bring the evidence to the local public security organ, procuratorate or people's court with jurisdiction. If it is a consumer dispute, you can complain to the Industrial and Commercial Bureau. If fraud is involved, you can call the police directly.

Fraud refers to the act of defrauding a large amount of public and private property by fabricating facts or concealing the truth for the purpose of illegal possession. The composition of the general crime of fraud (accomplished) is: cheating-the other party has a wrong understanding-disposing of property based on the wrong understanding-the actor or the third party obtains property-and the victim suffers property losses. Although there are various forms of fraud, grasping these characteristics in some similarities can avoid going astray and falling into a trap.

Reports, complaints and reports can be made in writing or orally. The staff who accept the oral report, complaint or report shall make a written record, which shall be signed or sealed by the informant, complainant and informant after being correctly read out. The staff who accept the complaint and report shall explain the legal responsibility of false accusation and frame-up to the complainant and informant. However, as long as it is not fabricating facts and evidence, even if the facts of the accusation and report are different, or even false accusation, it should be strictly distinguished from false accusation. Public security organs, people's procuratorates or people's courts shall ensure the safety of informants, complainants, informants and their close relatives. Informants, complainants and informants who are unwilling to disclose their names and report, accuse and report their acts shall keep them confidential.

Prosecution must meet the following conditions:

(1) The plaintiff is a citizen, legal person and other organization that has a direct interest in the case;

(2) Having a clear defendant;

(3) Having specific requests, facts and reasons;

(4) It falls within the scope of civil litigation accepted by the people's court and is under the jurisdiction of the sued people's court.

Legal basis:

criminal law

Article 266 Whoever defrauds public or private property in a relatively large amount shall be sentenced to fixed-term imprisonment of not more than three years, criminal detention or public surveillance, and shall also, or shall only, be fined; If the amount is huge or there are other serious circumstances, he shall be sentenced to fixed-term imprisonment of not less than three years but not more than ten years and shall also be fined; If the amount is especially huge or there are other especially serious circumstances, he shall be sentenced to fixed-term imprisonment of not less than 10 years or life imprisonment, and shall also be fined or confiscated.