In June 2016, the United Nations High Commissioner for Refugees (UNHCR) presented his latest annual report on the situation of refugees and displaced persons around the world. Once again, this account documents new record levels in refugee numbers, both in industrialised and in developing countries. For governments and aid organisations, these statistics constitute an important basis for addressing displacement-related challenges in a more effective manner. However, the data provided by UNHCR is often incomplete and marked by a number of shortcomings. Increasingly high expectations are being placed on development cooperation in terms of tackling the root causes of forced displacement. Meeting these expectations requires reliable data.