Oregon Revised Statutes Mortgages and Liens § 87.039

(1) A person filing a claim of lien pursuant to ORS 87.035 shall mail to the owner and to the mortgagee a notice in writing that the claim has been filed. A copy of the claim of lien shall be attached to the notice. The notice shall be mailed not later than 20 days after the date of filing. Notice mailed to the owner who received the notice of right to a lien as provided by ORS 87.021 shall be deemed in compliance with the requirement of this subsection, unless the person giving notice has actual knowledge of changed ownership. Notice mailed by any person to the mortgagee who received the notice required under ORS 87.025 shall be deemed in compliance with this subsection unless the person giving the notice has actual knowledge of a change of mortgagee.

(2) No costs, disbursements or attorney fees otherwise allowable as provided by ORS 87.060 shall be allowed to any party failing to comply with subsection (1) of this section.