Abstract
The article presents selected problematic issues arising where competition law meets public procurement law. Ensuring the functioning of an integrated system of combating restrictive practices can be seen as one of the most important challenges faced by contemporary competition law and public procurement law. The principle of fair competition is examined through the prism of the Public Procurement Law of 11 September 2019. The most common form of distortion of competition is cartel collusion, where tender collusion is of major importance. It should also be stated that the distortion of competition may occur in the case of a violation of the prohibitions arising from the Act on Competition and Consumer Protection, and due to acts of unfair competition referred to in the Act on Unfair Competition.