This policy brief draws recommendations from the empirical study ‘The German Due Diligence Act and the Automotive Supply Chain in Africa: An Opportunity for Trade Union Solidarity?’. It emphasise the indispensable role of trade unions, works councils and shop stewards in ensuring the Act’s effectiveness in holding companies truly accountable, to improve the working conditions of workers and to organise along the supply chain. At the same time, it provides recommendations to make the participation of trade unions binding in the implementation of the Act.