This briefing explores the potential of grievance mechanisms in multi-stakeholder initiatives to address the adverse impacts of corporate activity on workers and communities. It is based on a four year research project which examined grievance mechanisms in six MSIs. It finds that grievance mechanisms can provide significant benefits to workers and communities. But individual grievance mechanisms perform very differently from one another. At the same time a variety of serious problems currently undermine the value of of grievance mechanisms for workers and communities. The briefing therefore makes ten recommendations for how to enhance MSI grievance mechanisms in the future.