Three conditions must be met for filing a case.

Legal analysis: The following conditions must be met for filing a case: (1) There are criminal facts. Objectively, there is some kind of crime and social harm. Including but not limited to crime preparation, crime, attempted crime, completion or suspension. (2) investigate criminal responsibility. Although some acts are illegal, according to the relevant provisions of the criminal law, if their severity is not enough to pursue criminal responsibility, they will not be filed. For example, stealing other people's property for many times is less than 2000 yuan. (3) Belonging to the jurisdiction, the public security, the court and the procuratorate perform their respective duties, which does not mean that any criminal acts can be solved by the public security organs. In addition, if the whistleblower's case does not meet the filing criteria, a written Notice of Not Filing shall be issued to the whistleblower to inform him of the reasons for not filing the case. Legal basis: Article 19 of the Criminal Procedure Law of People's Republic of China (PRC): Criminal cases shall be investigated by public security organs, unless otherwise stipulated by law.

Crimes such as illegal detention, extorting confessions by torture, and illegal search. The people's procuratorate may file a case for investigation of illegal acts found by judicial personnel in the process of legal supervision of litigation activities. If a major criminal case of a functionary of a state organ under the jurisdiction of a public security organ needs to be directly accepted by a people's procuratorate, it may be placed on file for investigation upon the decision of a people's procuratorate at or above the provincial level. Article 109 of the Criminal Procedure Law of People's Republic of China (PRC): When a public security organ or a people's procuratorate discovers a criminal fact or a criminal suspect, it shall file a case for investigation within its jurisdiction. Article 112 of the Criminal Procedure Law of People's Republic of China (PRC): The people's courts, people's procuratorates and public security organs shall promptly examine the materials reported, accused, reported and surrendered according to their jurisdiction, and if they think that there are criminal facts that need to be investigated for criminal responsibility, they shall file a case; If it is considered that there are no criminal facts, or the criminal facts are obviously minor, and it is not necessary to pursue criminal responsibility, the case shall not be filed, and the complainant shall be informed of the reasons for not filing the case. If the complainant refuses to accept it, he may apply for reconsideration. Article 16 of the Criminal Procedure Law of People's Republic of China (PRC): In any of the following circumstances, criminal responsibility shall not be investigated, and if it has been investigated, the case shall be dismissed, or prosecution shall not be initiated, or the trial shall be terminated or acquitted:

(a) if the circumstances are obviously minor and the harm is not great, it is not considered a crime;

(two) the crime has passed the limitation period;

(3) Being exempted from punishment by an amnesty order;

(4) Failing to tell or withdrawing a crime that should be dealt with only after being told according to the Criminal Law;

(5) The criminal suspect or defendant dies;

(six) other laws and regulations shall be exempted from criminal responsibility.