Arizona Waiver of a Preliminary Hearing is a legal procedure whereby a defendant waives their right to a preliminary hearing before a judge. With this waiver, a defendant agrees to allow the prosecutor to submit the case to a grand jury for indictment or to file a direct complaint without a formal hearing. The waiver is typically signed by both the defendant and their attorney, and is done in open court. There are two types of Arizona Waiver of a Preliminary Hearing: voluntary and involuntary. A voluntary waiver is done when the defendant is in agreement with the waiver. An involuntary waiver is done when the defendant does not agree with the waiver, but is still bound by it due to certain circumstances.