The study focuses on issues concerning the classification process of convicts serving a custodial sentence. A selection of the most important related issues, which the author believes are the most relevant for practice, is analysed. In this context, the situation of convicts posing a serious social risk or a serious threat to the security of the prison and of convicts qualified for the therapeutic regime is described. The placement of the convicted person in the relevant prison in view of his or her place of residence prior to incarceration also became an issue. A number of recent changes to the prison classification legislation are also analysed.