
A mixed (sequential) penalty, introduced by the amendment to the Penal Code of February 20, 2015, is intended to fulfil an important function in the system of reaction measures to a crime. The problem of achieving the objectives of a mixed penalty arises when the convict is serving an imprisonment sentence imposed as part of a sequential penalty in the electronic monitoring system. Undoubtedly, this problem is noticed both by the courts in their judicial decisions and by representatives of the doctrine. The author aims to make an in-depth analysis of this controversial issue of great practical importance and to formulate conclusions on the law as it should be based on it.