In the study presented here, the author attempts to answer questions about the acquisition of information by prison staff that may have a bearing on their safety related to their service and work, the safety of isolated persons, and the general public. Internal regulations of the Prison Service (PS) related to the process of obtaining, processing, collecting and using information are indicated and discussed. Based on the research, the knowledge and action of PS officers in this area was analysed. The article aims to show information as an important factor directly affecting the security of penitentiary units.