The processes of social stigmatisation and marginalisation of former convicts form a serious obstacle to their social re-adaptation, The effects achieved as part of penitentiary resocialisation while serving a prison sentence are insufficient for them to become independent in free society, combined with the reaction of social reluctance and rejection. The purpose of this article is to present the role of institutionalised post-penitentiary assistance in counteracting social stigmatisation and marginalisation of former convicts. The article explains the notion of social stigmatisation and marginalisation, the meaning of resocialisation activities within the context of preparing an convict for releasing him/her from a correctional facility, as well as the scope and forms of post-penitentiary assistance. For the purposes of explaining stigmatisation, the author used theories of social stigma.