This article examines the question to what extent offenders are involved in decisions regarding the sanction, measure and/or conditions that have been imposed upon them. More specifically, the article focuses on the offender's involvement in the stage of implementation (or enforcement) of a conditional sentence or measure. It analyses Dutch legislation and practice on this point and evaluates them in light of the relevant provisions of the European Rules on Community Sanctions and Measures and the European Probation Rules. The research shows that Dutch legislation and practice are generally in conformity with these European instruments; all interviewed probation officers realise the importance of involving offenders and act upon this belief. However, on some points a higher level of offender involvement could be reached, and promoting the European rules amongst probation workers -who are mostly unaware of the existence of these rules -might contribute to this.