1. When collecting and obtaining evidence from relevant units and individuals, public security organs shall inform them that they must provide evidence truthfully, and inform them of the legal responsibilities they should bear for forging, concealing or destroying evidence and providing false testimony;

2, need to obtain evidence from the relevant units and individuals, with the approval of the person in charge of the case handling department of the public security organ, issued a notice of obtaining evidence, clear evidence and provide time limit;

3. The transferee shall stamp or sign the notice. If the transferee refuses, the public security organ shall indicate it. When necessary, the public security organ shall fix the content of evidence and the process of obtaining evidence by means of audio and video recording;

4. If it is necessary to obtain evidence from the relevant units urgently, the public security organ may inform the identity of the people's police by telephone, and send the Notice of Obtaining Evidence together with a copy of the people's police card of the people's police handling the case to the relevant units by fax or Internet communication tools.

Legal basis: Article 28 of the Procedures for Handling Administrative Cases by Public Security Organs.

When collecting and collecting evidence from relevant units and individuals, the public security organs shall inform them that they must provide evidence truthfully, and inform them of the legal responsibilities they should bear for forging, concealing or destroying evidence and providing false testimony.

Need to obtain evidence from the relevant units and individuals, with the approval of the person in charge of the case handling department of the public security organ, issue a notice of obtaining evidence, and specify the evidence obtained and the time limit for providing it. The transferee shall affix his seal or signature to the notice. If the transferee refuses, the public security organ shall indicate it. When necessary, the public security organ shall fix the content of evidence and the process of obtaining evidence by means of audio and video recording.

If it is urgent to obtain evidence from the relevant units, the public security organ may inform the identity of the people's police by telephone, and send the Notice of Obtaining Evidence together with a copy of the people's police card of the people's police handling the case to the relevant units by fax or Internet communication tools.