This study appraised the EU RDRAs on Nigerian irregular migrants and examined the challenges of RDRAs on Nigerian irregular migrants. The study made use of primary sources of data through in-depth interview conducted on EU delegation to Nigeria and ECOWAS, European External Action Service, Frontex, International Organisation for Migration, Idia Renaissance, Nigeria Immigration Service and the National Agency for the Prohibition of Trafficking in Persons. Findings from the study showed that two types of return directive exits; voluntary return and enforced return. Voluntary returnees are provided with Assisted Voluntary Return and Reintegration (AVRR) while enforced returnees are not provided with AVRR, and they are likely detained, escorted by the policemen through the back door and corridor of the airport and deported to Nigeria or transit countries. Findings from the study showed the challenges of RDRAs on Nigerian irregular migrants in that, most return carried out by the EU are not in compliance with the laid down regulation as some migrants are return to countries of transit. Moreover, the conditionality attached to readmission agreements are only applicable for high-skilled migrants, a situation described as brain drain for Nigeria and brain gain for the EU. The study concluded that EU RDRAs are restrictive in nature which provide escape routes for irregular migrants in European countries, and that lack of compliance on RDRAs are the results of unlawful detention of Nigerian irregular migrants by the EU as well as torture and abuse by the security officials and traffickers, a situation that violate human rights.