The European Union since the 1990s has been engaged in a unique project of reducing mobility controls between members while strengthening the external borders and then shifting control outward. The individual pieces of the remote control strategies themselves are common, with the exception of the Frontex external border control coordinating agency, which does not have parallels in the North American or Australian cases. Europeanization has cross-cutting effects on remote control. The ubiquity of policies rooted in law, regulations, or formal agreements with other states—around readmission, visas, carrier sanctions, safe third countries, and safe countries of origin—is a result of Europeanization. However, Europeanization also includes built-in constraints derived from its supranational courts and institutions.