The EU and Turkey deal are seeking to close the 'Balkan route' to Europe. On March 7 2016, Turkey offered to take back any migrants entering the EU from Turkey who didn’t qualify for protection. For every migrant Turkey receives, the EU has offered to resettle one Syrian refugee currently residing in Turkey. Franck Düvell argues that this seemingly simple and straightforward swap will face a litany of legal and logistical uncertainties.