Arizona Proof of Delivery or Mailing Notice of Application in Informal Proceeding is a document issued by the Arizona Superior Court to serve as proof that the recipient has been formally notified of an application to initiate an informal proceeding. This document is issued when the applicant has elected to use the court's mail delivery service in order to serve the recipient with the application. This document is issued by the court clerk and includes details such as the date of delivery, the name of the recipient, and the name of the applicant. It also includes a copy of the application that has been served to the recipient. There are two types of Arizona Proof of Delivery or Mailing Notice of Application in Informal Proceeding: 1. Certified Mail — This type of proof of delivery is used when the applicant chooses to use the United States Postal Service's Certified Mail service. This service requires the recipient to sign for the certified mail in order to prove delivery. 2. Return Receipt Requested — This type of proof of delivery is used when the applicant chooses to use the United States Postal Service's Return Receipt Requested service. This service requires the recipient to sign for the mail in order to prove delivery. The return receipt is then returned to the court clerk.