Restrictive agreements are agreements among market participants that significantly restrict, distort or prevent competition. This paper aims to elucidate the concept of restrictive agreements as a form of competition infringement within the scientific, professional and business-legal communities. The paper systematizes the definitions of this concept and examines the relevant laws and regulations governing it. Additionally, the paper will analyze and evaluate the efficacy of the Commission for the Protection of Competition, highlighting both its strengths and weaknesses in making decisions on the prevention of monopolies. Through an analysis of the commission's decisions concerning companies operating within the territory of the Republic of Serbia, this paper identifies challenges and proposes solutions to enhance the Commission's effectiveness.