The document provides guidance on developing an effective case for support to persuade potential donors to fund an organization. It stresses the importance of having a clear vision, mission, and values, being well-prepared with relevant information, and including key elements in the content such as the problem being addressed, the organization's approach, expected outcomes, and sustainability plan. The case should emphasize benefits over features, credibility, and realistic expectations while using clear language, case studies, and research to back up claims.