The purpose of the study was to determine the content of the concepts of "impeccable character" and "guarantee of proper performance of the profession" of a judge. Both of these concepts are important from the point of view of assessing the suitability of a candidate for the office of judge, despite the fact that the Law on the Common Court System does not mention the guarantee as a requirement for candidates. Particular attention was paid to ethical principles and medical examinations, which should help to assess the attitude of a candidate for judge in the future. The final section also refers to the political involvement of judges in the context of integrity and independence.