The document provides guidance on creating an effective case for support to win donors. It emphasizes telling a clear and compelling story with a beginning, middle and end to attract donors' attention. The story should be told in the language donors understand and consistently across different media. An effective case for support answers key questions about the problem being addressed, the organization's vision and values, who they are, what makes them special, their work, impact of past donor support, and how future support can make a difference. It provides templates to structure the case for support.