OBJECTIVE: The aim: The aim of this work is to identify the compliance level of modern practice of placement of a person in a medical institution in order to conduct the FPE to international standards and legal positions of the ECHR in terms of ensuring the right to liberty and security of person; formulation of scientifically substantiated proposals on the synchronization directions of national practices with the specified international standards. PATIENTS AND METHODS: Materials and methods: During the preparation of the article the following was processed: scientific research on ensuring the rights of persons suffering from mental disorders in criminal proceedings; provisions of international agreements on the provision of psychiatric care; legal positions of the ECHR on the observance of persons' rights suffering from mental disorders (15 judgments on this topic); criminal procedural legislation of individual states; results of generalization of national law enforcement practice; the results of a survey conducted by the authors of 18 psychiatrists who practice in the field of forensic psychiatric examinations (psychiatrists working in state psychiatric clinics in Odesa, Poltava, Kharkiv were interviewed). In the process of research a set of general scientific and special methods of cognition was used (comparative-legal method, system-structural method, generalization method, method of analysis and synthesis, method of sociological research, method of expert assessments, etc.). RESULTS: Results: According to the research results: a) legal positions of the ECHR on the observance of the rights of persons suffering from mental disorders are identified and generalized; b) the compliance level of modern practice of placing a person in a medical institution in order to conduct the FPE with international standards and legal positions of the ECHR in terms of ensuring the right to liberty and security of person (§ 1 of Article 5 of the Convention); c) the degree of extrapolation of these positions to the activities of psychiatrists is analyzed; d) the optimal ways of solving the existing problems in the aspect of ensuring the rights of a person when placing them in a medical institution for an inpatient FPE are proposed. CONCLUSION: Conclusions: The current national practice of placing a person in a medical institution for an inpatient FPE does not fully comply with the legal positions of the ECHR in terms of ensuring the right to liberty and security of person (in particular, there are deviations from the positions of the ECHR on: determining the documentary basis for the appointment of an inpatient FPE; interaction of police and medical workers in the field of psychiatry during the detention of a person with a mental disorder).