Advocacy is a well-recognised tool to strengthen the protection of people in crisis. The added value of collective efforts is demonstrated by the complementary roles that a range of stakeholders undertake, thereby leveraging their comparative advantages. This briefing note sets out to collate examples of international and national humanitarian actors engaging in collaborative advocacy efforts. It outlines the roles different actors play in advocacy partnerships as well as the factors that enable and challenge actors working together to advocate on matters of protection. It aims to highlight elements of good practice and suggest opportunities for change. This paper builds on the findings of HPG’s report on complementary advocacy approaches between international and local and national humanitarian actors.