This report, based on the findings of a survey, provides a valuable overview of the current role and value of volunteers working with (ex) offenders, their families and victims of crime, highlighting what works and beginning a dialogue on best practice. It is built on the belief that expanding and encouraging involvement of volunteers in the sector is a key strategy for reforming prison and probation services, rehabilitating (ex) offenders and providing relevant care and support to the families of (ex) offenders and the victims of crime. This report covers various areas of interest, such as how organisations select, train and engage volunteers; and how volunteers and paid employees work side by side. Other areas of the research include how organisations structure civil engagement work carried out by volunteers, and where the lines blur between NGOs and wider social service provision. Generally, the responses demonstrate the multifaceted and extensive use of volunteers working in various roles and sectors across the EU.