Oklahoma Proof of Posting and Affidavit of Mailing Notice are documents used to legally prove that a party has delivered a document, such as a Notice of Intent to Sue, to another party. These documents are used to provide evidence in a court of law that the document was sent to the intended party. There are two types of Oklahoma Proof of Posting and Affidavit of Mailing Notice: Proof of Posting Notice and Affidavit of Mailing Notice. Proof of Posting Notice is an affidavit that is filled out by the sender of the document. It certifies that the sender has sent the document via regular mail, certified mail, or another method of delivery, and that it was sent to the intended recipient. It also contains the date and time of mailing, the address of the recipient, and the method of delivery. Affidavit of Mailing Notice is a document that is filled out by the sender of the document. It provides additional evidence that the sender has mailed the document to the intended recipient. It contains the date of mailing, the address of the recipient, and a signature of the sender. This document can be used to show that the sender made an effort to notify the recipient of the document. These documents are used in the Oklahoma court system to provide evidence that the sender has made an effort to deliver the document to the intended recipient. They are important documents that help ensure that parties are given the opportunity to respond to any legal documents that have been sent to them.