What's the use of a no crime certificate? The full name of "no crime certificate" is generally "no crime record certificate", which refers to a certificate issued by the local police station where the resident's household registration is located, proving that the resident is within the jurisdiction and can not read the criminal record within a certain period of time. For this certification, some national level examinations will be used as a mandatory registration requirement, such as the national judicial examination in China. At the same time, many units will also require this certificate when recruiting. Secondly, if you need to apply for the Certificate of No Illegal or Criminal Record, you generally need your ID card and household registration book. If the police station asks about the reason for applying for the certificate, you can truthfully inform the police station of "work" and "examination". The police station only conducts formal review. If it is lost, it can be replaced with the above materials. Finally, due to the different service levels of local public security organs, it is recommended that before going to the police station for handling, you should first ask the police station by phone what certificates you need to carry to avoid wasting your time due to the special requirements of some places.
 Except those who are confirmed guilty in the effective judgment of the people's court, all others are persons with no criminal record. The certificate of no criminal record has permanent effect, but can only prove that the person at that time did not commit a crime within a certain period of time. The certificate of no criminal record cannot be used for domestic litigation purposes. According to Article 100 of the Criminal Law, a person who has been subject to criminal punishment according to law shall truthfully report to the relevant units that he has been subject to criminal punishment when he is enlisted or employed, and shall not conceal it. A person who was under the age of 18 at the time of committing a crime and sentenced to a sentence of not more than five years' imprisonment is exempted from the reporting obligation in this provision, and his relevant criminal records will be sealed up and may not be provided to any unit or individual. The judicial organ may make inquiries for the needs of handling cases or the relevant units according to the national regulations, but shall keep the sealed criminal records confidential. The above content is about the certificate of no criminal record. I hope it will be helpful to you.