Forensic Psychiatry is a subspecialty of psychiatry in which scientific and clinical expertise is applied in legal contexts involving civil, criminal, correctional, regulatory or legislative matters, and in specialized clinical consultations in areas such as risk assessment or employment. These guidelines apply to psychiatrists practicing in a forensic role. Psychiatrists who take on a forensic role for patients they are treating may adversely affect the therapeutic relationship with them. Forensic evaluations usually require interviewing corroborative sources, exposing information to public scrutiny, or subjecting evaluees and the treatment itself to potentially damaging cross-examination. The forensic evaluation and the credibility of the practitioner may also be undermined by conflicts inherent in the differing clinical and forensic roles. Treating psychiatrists should therefore generally avoid acting as an expert witness for their patients or performing evaluations of their patients for legal purposes. Treating psychiatrists appearing as “fact” witnesses should be sensitive to the unnecessary disclosure of private information or the possible misinterpretation of testimony as “expert” opinion. In situations when the dual role is required or unavoidable (such as Workers’ Compensation, disability evaluations, civil commitment, or guardianship hearings), sensitivity to differences between clinical and legal obligations remains important.