An outline of the background to the provision of psychological evidence within legal settings will be provided, with attention to formal and quasi-court settings (e.g., tribunals). Key points of relevance to psychologists and to educational psychologists in particular will be illustrated, including guidelines for defendable written and oral evidence. The Civil Procedure Rules and their application to expert witnesses will be used to indicate the standards for witness evidence. The paper will conclude by outlining the significance of distinguishing between process and content. The importance of presenting with expertise both in content (e.g., qualification as an educational psychologist) and court process is highlighted. (Contains 2 tables, 1 figure, and 1 footnote.)