An Arizona Investigator Appointment Letter is a document issued by an Arizona court or law enforcement agency to appoint an investigator to conduct a specific investigation. The letter outlines the name of the investigator, the scope of the investigation, the duration of the investigation, and the investigator’s authority. There are two types of Arizona Investigator Appointment Letters: a limited authority appointment letter and a general authority appointment letter. A limited authority appointment letter grants the investigator limited powers to investigate the case and must be signed by a representative of the court or law enforcement agency. A general authority appointment letter grants the investigator full authority to investigate the case, and must be signed by a judge or magistrate. Both types of appointment letters are typically issued in criminal investigations.