The article describes the activities of the Communist political police against former German citizens who remained in their places of residence in the part of East Prussia incorporated into Poland. Polish communists until the end of the 1940s were conducting a policy that would eliminate German nationality from the inhabitants of Poland. From the end of the 1940s there was a concerted attempt to eliminate anyone with German nationality and those questioning the new Polish–German border that was created in 1945 among the remnants of the German citizenry. The Communist political police were also interested in people (and their views) who showed a critical attitude toward the Communist regime introduced into Poland