Oregon Revised Statutes Remedies and Special Actions and Proceedings § 34.080

Upon the filing of the order allowing the writ, and the petition and undertaking of the plaintiff, the clerk shall issue the writ, as ordered. The writ shall be served by delivering the original, according to the direction thereof, and may be served by any person authorized to serve a summons. A certified copy of the writ shall be served by delivery to the opposite party in the suit or proceeding sought to be reviewed, at least 10 days before the return of the original writ.