The Drug Policy Network South East Europe is an initiative of NGOs from the countries of South East Europe. Currently, there are 26 member organisations of the Network coming from Albania, Bosnia Herzegovina, Bulgaria, Croatia, North Macedonia, Greece, Kosovo*, Montenegro, Romania, Serbia and Slovenia. The cooperation between the organisations in South East Europe dates back to autumn 2009. In March 2010, an informal network of NGOs was created to continue the cooperation with the relevant authorities responsible for drug policy. Good experience of partnership and joint projects resulted in formal creation of the Drug Policy Network South East Europe in October 2015. The DPNSEE is a network of key affected populations and the Network organisations are primarily providers of preventive, therapeutic, harm reduction and rehabilitation services.