EN
The following article discusses issues concerning one of the most effective methods of operational work that is a controlled purchase used by police to combat organized crime. The article presents in detail the methods and purpose of the activities to be taken as part of actions which are of particular importance for public safety of every society. It also refers to the underlying regulation of these activities and presents in detail the methods and purpose of the activities to be taken as part of actions which are of particular importance for public safety and not just any society. There are also discussed situations causing legal and social controversy connected with the use of this particular method for the operational work in police investigation activities.