This article explores genocide recognition politics (GRP) with a specific focus on Saddam Hussein’s Anfal campaign (1988) against the Kurdish population in the Kurdistan Region of Iraq (KRI). In the context of a pending referendum on independence in the KRI, this study investigates the evolution of GRP in relation to secession, nation-building and commemoration as well as the social, political and economic drivers in the process. In addition, the study zeroes in on the internationalization of genocide recognition claims via diaspora lobbying and the Kurdish Regional Government in Iraq (KRG)’s bureaux of representation in Europe. The results are based on extensive fieldwork conducted with KRG representatives, diaspora entrepreneurs and other stakeholders between 2012 and 2016 in Europe and Iraqi Kurdistan. The KRG’s genocide recognition claims are not explicitly associated with secession, but instead are employed to legitimize local rule by referencing collective trauma and shared victimhood. In this way, Anfal – as the ‘chosen trauma’ – has become a component of (local) nation-building mechanisms. Nevertheless, recognition claims can become instrumentalized for secession so long as the political circumstances in the region become favourable to Kurdish independence. In the diaspora context, GRP serve to establish a link to homeland through commemoration practices, but they also provide greater space for lobbying and transnational advocacy networking.