Trafficking for labour exploitation has increasingly attracted the interest of policy makers, investigators and labour inspectors in Europe. Recognising this interest, the Ministry of Foreign Affairs of the Netherlands funded the project Capacity Building for Combating Trafficking for Labour Exploitation. The project aimed at setting up a programme of training sessions on trafficking for labour exploitation and related matters, such as cross-border judicial cooperation, transnational police investigation, and European and international legal framework of combating labour exploitation. The purpose of this publication is to summarize the proceedings of the project by reiterating the most important lessons learned, as well as to provide a basis for potential replication of one or more of the trainings conducted in its framework.