In this research paper the author considers the problematic aspects of interaction of bodies (units) of state border protection and customs of the State Customs Service of Ukraine during the detection of signs of violations of customs rules, as well as the indentifying property that has no owner or owner unknown at border crossings. entry-exit checkpoint, in the controlled border area. At the same time, the current state of legal regulation of this issue, the main legislative developments in this area, which took place in connection with the joint order of the Ministry of Finance and the Ministry of Internal Affairs of Ukraine number 849/828, foreign approaches to cooperation between customs and border units. Based on the study, it was concluded that the issues of cooperation between state border guards and customs of the State Customs Service of Ukraine are regulated by the updated Procedure number 849/828, approved by a joint order of the Ministry of Internal Affairs and the Ministry of Finance of Ukraine. a number of powers from the administrative-operational group to draw up reports on administrative offenses, to send an act of detection, and on the property of the owner, who is unknown or as has no owner - transfer of property to the relevant department of the State Customs Service of Ukraine, to other officials of state border guards, and also extended the validity of this document not only to cases of violations of customs rules, property whose owner has no owner or whose owner is unknown, detected at checkpoints across the state border of Ukraine, but also for similar cases detected at the checkpoint of entry-exit, in the controlled border area. At the same time, the mentioned Procedure number 849/828 does not solve a number of urgent issues of such interaction, such as: insufficiently effective coordination of work of state border guards and customs of the State Customs Service of Ukraine on ensuring unity of customs and border control, impossibility to send a representative protection of the state border (units of protection of the state border) and customs of the State Customs Service of Ukraine, carrying out separate control in cases when it is necessary to carry out joint control, lack of interest in such interaction, lack of a specific list of reasons when a joint inspection should be conducted, lack of sanctions for failure to conduct a joint inspection in case of detection of goods moving in violation of customs rules and border legislation without sufficient reasons. Therefore, a solution to these problems is proposed.