Oregon Affidavit of Service (5C) is a document used to certify that legal papers have been served properly in the state of Oregon. It is typically used to serve a summons and complaint, a subpoena, or a notice of hearing. The Oregon Affidavit of Service (5C) must be signed by the person who served the papers, and it must be filed with the court as proof of service. There are three types of Oregon Affidavit of Service (5C): personal service, substituted service, and service by mail. Personal service is when the documents are served directly to the defendant or respondent by an individual other than the plaintiff or petitioner. Substituted service is when the documents are served to someone else other than the defendant or respondent, such as an adult family member at their home or workplace. Service by mail is when the documents are mailed to the defendant or respondent by registered mail with return receipt requested.