European immigration control has been increasingly offshored in recent years. Various measures, such as the introduction of stricter visa requirements, carrier sanctions, and immigration liaison officers, effectively shifted immigration control away from the European border into third states’ territories. As these extraterritorial controls are usually not accompanied by appropriate legal safeguards, they raise important questions from a human rights perspective. For refugees, in particular, they make access to protection increasingly unavailable. This book is therefore concerned with the question of how refugee rights can be upheld in situations of offshored immigration control. It answers this question from an interdisciplinary perspective, dealing with theoretical concepts that need to be revisited in order to strengthen international law’s effectiveness in these situations, such as ‘the border’ and ‘sovereignty’; the development, forms and rationales of offshored immigration control; and legal instruments to ensure human rights protection in these cases, especially regarding the principle of non-refoulement.