Introduction. In this article, a comprehensive analysis of determining the value of a document in the activity of the National Police in Ukraine is carried out in order to establish the significance of documents in police activity. Police officers work and process a large number of documents that directly affect the legality of the exercise of authority and the level of effectiveness of this body. Therefore, the question of the significance of documents in police activity is quite important. Summary of the main results of the study. For a comprehensive and objective disclosure of the chosen topic, a study of the essence of police activity was carried out in order to establish the place of the document in the relevant sphere of authority, as a result of which a conclusion was made regarding the main essential areas of police activity, namely: protection of public order and public safety, human and citizen's rights and freedoms, prevention of offenses, detection of causes of offenses, termination of offenses, investigation of committed offences. That requires processing and creating a significant number of documents in the course of exercising police powers, in these areas of their activity. The origin of the document as a material carrier of information was also analyzed, a historical tour of the origin of this term was carried out, and its quintessence was determined. The features of the document are highlighted and its types are defined. As a result, the concept of a document was formed as a material medium for recording, storing and transmitting information. This definition fully corresponds to the essence of the application of the document in police activity, which is the basis for establishing the relationship between the document and police activity. Having determined the main issues of the researched topic, an analysis of the place of documents in the activity of the police in Ukraine was carried out through the specification of their manifestations, in the course of the exercise of police powers. Based on this, it was established that certain types of documents must be drawn up in the activities of the police, which are related both to organizational and administrative activities, and to the application of preventive or coercive measures. Conclusions. So, after analyzing the chosen topic, you can come to conclusions about the undoubted value of the document in police activities. Namely, the document serves in police activities as a means of recording information about the exercise of certain powers by police officers, certification of the fact of the performance of official duties, certain facts, and serves as a means of proof. In addition, the document records a fact that has legal significance and causes the emergence, change or termination of legal relations and a change in the legal status of a person. Therefore, the document is an important component of police activity in Ukraine.