This chapter focuses on report writing and testimony as part of disability evaluation. More specifically, it explains how to organize a report, what information should (and should not) be included, the required level of detail, and the effective response to referral questions. It also highlights the importance of accurate communication of information. The chapter first discusses the purpose of a written report in evaluations of disability and the organizational structure of the forensic report before turning to the information that must be included in the evaluation report. It presents an example of a format divided into the following sections: introduction, procedures, summary of records reviewed, behavioral observations and mental status data, clinical interview, data from psychological or neuropsychological testing, collateral contacts, formulation of opinions, and answers to referral questions. Finally, the chapter describes how the written report can form the basis for testimony in court or in an administrative hearing.