There is a specially organized type of service, as part of the criminal justice system, which deals with the supervision of perpetrators of criminal acts. The Probation Service works with the aim of reducing the risk of re-offending, while at the same time taking care of the protection of society, as well as the reintegration of perpetrators into society, respecting the rights of victims. It does not impose measures, obligations or sanctions, but executes them on the basis of final judgments or decisions by the state attorney or enforcement judge. The probation service in the Republic of Croatia is the youngest "member" of the criminal justice system, if we look at it from the point of view of the year when the first Law on Probation in the Republic of Croatia was adopted, which is 2009. We can consider the mentioned year as the year when the foundations for the work of the probation service were laid, but the first work with perpetrators of criminal offenses was recorded in 2011, when working contact between probation officers and perpetrators of criminal offenses was actually achieved in probation offices. The work of the probation service is performed by educated probation officers who can come from different branches of society, but the quality and efficient performance of probation work is greatly influenced by cooperation with a number of partners from the police, the prison system, the centre for social welfare, through the academic community to non-governmental organizations.