An Arizona Affidavit of Service by Certified Mail is a form used by a party to serve a legal document by mail. It is a sworn statement that the legal document was sent to the intended recipient. The affidavit is signed in front of a notary public to verify its authenticity. There are two types of Arizona Affidavit of Service by Certified Mail: an Affidavit of Service with a Certificate of Service and an Affidavit of Service without a Certificate of Service. The Affidavit of Service with a Certificate of Service includes the original mailing receipt and a return receipt, both of which are signed by the addressee or an authorized agent. The Affidavit of Service without a Certificate of Service includes only the original mailing receipt, which is signed by the sender.