The article presents selected problems of the activities of the Polish political police in 1919-1939. The author disscused organizational changes and the operational work model of this formation and presented methods of activity, especially confidential intelligence, surveillance and observation. Much attention was devoted to issues of cooperation with informants and informers. Applicable principles in this respect were discussed. Attention was paid to the selection of secret colleagues. The problem of assessing the credibility of the materials they provide was highlighted. The basic tasks of the political police were discussed, taking into account existing security threats. It was noted that their the scope of tasks changed depending on the guidelines of state authorities.