The I-CLAIM project examines migrant irregularity in Europe, using the concept of ‘irregularity assemblage" to analyse interconnected factors shaping irregular conditions. This report focuses on Dutch policies, aiming to understand their implementation and impact on the production of migrant irregularity in the Netherlands. In the Netherlands, the most frequently used definition of an irregular migrant is ‘a person without a valid residence permit’, often referred to as ‘undocumented’ (‘ongedocumenteerd'). This group includes rejected asylum-seekers, migrants who came (irregularly) to work (irregularly) or people who have reunited with their families irregularly. Support organisations primarily focus on rejected asylum-seekers. Estimates suggest that there are between 23,000 and 58,000 irregular migrants in the country, with the numbers declining over the past 25 years due to policy changes and EU enlargements. Over the past 25 years, Dutch policies have increasingly aimed to control migration flows, ...