This briefing paper sets out the main human rights risks linked to external migration policies, which are a broad spectrum of actions implemented outside of the territory of the state that people are trying to enter, usually through enhanced cooperation with other countries. From the perspective of international law, external migration policies are not necessarily unlawful. However, Amnesty International considers that several types of external migration policies, and particularly the externalization of border control and asylum-processing, pose significant human rights risks. This document is intended as a guide for activists and policy-makers.