The article deals with the issue of pactum de non petendo. The author points out the doubts concerning this pacti and presents the most appropriate definition of pactum de non petendo. The author discusses compatibility of pactum de non petendo with the right to a court, depending on the adopted conception of the effects of the pacti, in order to show that pactum de non petendo is not only compatible with the Constitution, but is also protected by it. The text is concluded with de lege ferenda postulates.