How long does it take to notify the informant after the alarm is filed?

Inform the informant within 48 hours after the alarm, and within 36 hours if an arrest is to be made. When a public security organ receives a criminal clue, it needs to examine it before deciding whether to file a case. If the public security organ believes that there are criminal facts that need to be investigated for criminal responsibility, it 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. Under normal circumstances, the public security organ decides whether to file a case within seven days after reporting the case. The time limit for filing a criminal case for review shall not exceed 3 days in principle; Suspected criminal clues need to be verified, and the time limit for filing a case for review shall not exceed 7 days; Major and complicated cases may be extended to 30 days with the approval of the person in charge of the public security organ at or above the county level. When the police station files a case, the notice of filing a case should be served on the victim or the informant, not on both sides. If the police station refuses to file a case, it shall, within three working days after filing the case, serve a notice of refusal to file a case on the informant according to law. If the informant fails to report, he may apply for reconsideration within seven days, and the organ shall conduct reconsideration within seven days.

Legal basis:

Criminal Procedure Law of the People's Republic of China

Article 110 Any unit or individual who discovers criminal facts or suspects has the right and obligation to report to the public security organ, the people's procuratorate or the people's court. Victims have the right to report and accuse criminal facts or criminal suspects who infringe their personal and property rights to public security organs, people's procuratorates or people's courts. Public security organs, people's procuratorates or people's courts shall accept reports, complaints and reports. If it does not belong to its own jurisdiction, it shall be transferred to the competent authority for handling, and the informant, complainant and informant shall be notified; For those who are not under their jurisdiction and must take emergency measures, they should take emergency measures first and then transfer them to the competent department.

Article 112 A people's court, a people's procuratorate or a public security organ shall, within the scope of their jurisdiction, promptly examine the materials of reporting, accusing, reporting and surrendering themselves, 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.

Derivative problem:

What if the police station does not file a case?

1. First, the victim can report the situation to the higher-level public security organ and ask the higher-level public security organ to urge the lower-level public security organ to file a case. Second, you can appeal to the procuratorate and ask the procuratorate for supervision; 2. If the people's procuratorate thinks that the public security organ will not file a case for investigation, or the victim thinks that the public security organ should file a case for investigation without filing a case for investigation, it shall ask the public security organ to explain the reasons for not filing a case.