The study presents a fragment of Polish public administration, namely the National Revenue Administration (“Krajowa Administracja Skarbowa”). The National Revenue Administration is an element of the structure of public administration in Poland and forms part of the administration designed to safeguard the financial security of Poland. The study presents characteristics of the public administration, including units of the National Revenue Administration, and the role of this administration in safeguarding financial security, emphasizing the role and responsibilities of the National Revenue Administration in this regard.