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COSA is a method for allowing the safe return of sex offenders into society.

Volunteers are at the core
COSA is successful in Canada, England and Wales. In COSA, volunteers play a crucial role. They ensure that sex offenders can make a new start and lead a responsible life.

Strong start in the Netherlands
The first results of an experiment with COSA in the 's-Hertogenbosch region are promising. COSA circles also started in Rotterdam and Breda and will start soon in Limburg and Alkmaar/Haarlem. Volunteers are warmly encouraged to sign up.

Devised in Canada
The method was devised in Canada in 1994 under the name "Circles of Support and Accountability". In the Netherlands, the method is called “Cirkels voor Ondersteuning, Samenwerking en Aanspreekbaarheid”.

Commissioned by the Ministry of Justice
In 2009, the Dutch Ministry of Justice commissioned the Avans Centre for Public Safety and Criminal Justice and the Dutch Probation Service to launch an initial plan for COSA in the Netherlands.

European grant


Thanks in part to European funding under Daphne III, cooperation with a number of project partners on this project is enabled in 2010 and 2011 for expansion in the Netherlands and beyond.