A Nevada Certificate of Mailing is a document issued by the Nevada Secretary of State's office to certify that certain documents were sent via U.S. Mail. There are two types of Nevada Certificates of Mailing: Regular and Express. The Regular Certificate of Mailing is used to certify that certain documents, such as a notice of dissolution or a notice of change of registered agent, have been sent via U.S. Mail. The Express Certificate of Mailing is used to certify that a document was sent via an express mail service, such as FedEx, UPS, or DHL. The Nevada Certificate of Mailing is a notarized document that is signed by a Nevada notary public and is legally binding. It is used to prove that a document was sent to the recipient in a timely manner.