Oregon Revised Statutes Remedies and Special Actions and Proceedings § 34.540

(1) The officer or person upon whom the writ was duly served shall state in the return, plainly and unequivocally:

(2) If the party is detained by virtue of any writ, warrant or other written authority, a copy thereof shall be annexed to the return, and the original shall be produced, and exhibited on the return of the writ, to the court or judge before whom the writ is returnable.

(3) If the person upon whom the writ was served has had the party in power or custody or under restraint at any time prior or subsequent to the date of the writ, but has transferred such custody or restraint to another, the return shall state particularly to whom, at what time, for what cause, and by what authority the transfer took place.

(4) The return shall be signed by the person making the same, and except where the person is a sworn public officer, and makes the return in official capacity, it shall be verified by oath.