Door-to-door evidence collection can only be done by judicial units such as the Public Security Law, and financial companies or third-party collection agencies have no right to do so.
The public security bureau, courts and procuratorates are law enforcement organs that safeguard people's interests and national security. They are similar, that is, they act according to law, but they are different in specific division of labor.
The public security organs are public security organs in China, and murders and robberies are taking place. The public security organs have the right to investigate and detain criminal cases such as rape and human trafficking.
Legal basis:
People's Republic of China (PRC) Civil Procedure Law
Article 67 The people's court has the right to investigate and collect evidence from relevant units and individuals, and the relevant units and individuals may not refuse.
The people's court shall distinguish the authenticity of the documents submitted by the relevant units and individuals, and examine and determine their validity.
Article 66 When the people's court receives the evidential materials submitted by the parties, it shall issue a receipt indicating the name, page number, number of copies, original or photocopy of the evidence and the time of receipt, and the person in charge shall sign or seal it.
The full text of the procedures for handling administrative cases by public security organs (revised edition, 2020)
Article 28
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.