People with mental difficulties are a vulnerable group in society. Due to their diagnosis and health condition, medical intervention and hospitalization are often required. Also, due to their condition, such persons are sometimes not able to make a rational decision about whether they agree to a certain medical procedure or treatment. Therefore, the informed consent of such persons is extremely important. They must be informed about their diagnosis, methods and goals of medical treatment in a way that is understandable and suitable for them. But, on the other hand, there are situations that require immediate intervention or in which a person is simply not able to understand the information in any way it was conveyed. These are situations in which a person has a serious mental disorder and endangers her own life and health or life and health of others. In this case, an important role is played by the legislator, who must prescribe clear rules of conduct for the psychiatric institution, the court and other persons involved in the process. Voluntary hospitalization, hospitalization without consent, forced hospitalization and forced detention are regulated in our legislation.