peer reviewed ; Despite the fact that the global financial crisis has affected Belgium’s economic performance, the country has continued to be an attractive destination for migrants. Recently, however, there has been a dramatic change in migrant flows to Belgium, as a result of two phenomena. First and foremost, the country has experienced large inflows of post-accession migration from Central and Eastern European citizens. Second, 40 years after the end of the guest worker programmes, the economic crisis reactivated migration from Southern Europe. One important consequence of the economic crisis and the arrival of Central and Eastern European migrants has been the growing scepticism that has developed in Belgium towards the freedom of circulation. This has led the authorities to implement specific policies aimed at discouraging further migration of low-skilled EU migrants, who are deemed undesirable. In this chapter, we analyse a specific policy consisting of the removal of residence permits from EU jobseekers who claim social security benefits in Belgium. This policy has affected both Central and Eastern European as well as new Southern European EU migrants.Examining the mobilization of different organizations, we then show that—while they are numerically fewer—new Southern European immigrants are in a better position than other new immigrants in Belgium to challenge receiving country policies that target them.