This chapter from an Outdoor Emergency Care guide details the critical aspects of communication and documentation for OEC technicians. It emphasizes the importance of clear and accurate information exchange, covering both verbal methods like handoff reports using the SAILER acronym and radio protocols, and written forms such as field care notes, incident reports, and patient care reports (PCRs). The text outlines the essential content and proper procedures for each type of communication, including patient privacy, error correction (using FACTUAL-OEC guidelines), and the elements of a comprehensive clinical picture when transferring patient information. Finally, it introduces the role of incident investigation teams and underscores the need for thorough and legally sound documentation in all scenarios.