This report summarizes research into how accountability mechanisms contribute to the quality of humanitarian aid. Case studies in Kenya and Myanmar found that participation and feedback helped agencies understand needs and target assistance more effectively. It also built trust between aid organizations and communities. Complaints mechanisms highlighted issues and participation in project design and monitoring improved relevance, efficiency, and sustainability. However, the use of accountability in practice remains inconsistent. The report recommends routinely implementing accountability, further documenting practices, and adopting the research methodology to strengthen humanitarian responses.