Psychiatric nurses or therapists may be subpoenaed to appear as direct or expert witnesses. The response must be carefully prepared, and nurses must be aware that testifying in court can be an anxiety-provoking experience. Testifying often involves being an advocate for a client. Clients who have a mental illness, are developmentally disabled, or have a history of abuse or recent violence deserve a conscientious response. The legal process is the avenue for providing safety or empowerment, for assuring that needs are met, and rights are obtained, and being part of that process is an important role. Being prepared for the role is essential.