Oregon Revised Statutes Property Rights and Transactions § 92.018

(1) If a person buys a unit of land that is not a lawfully established unit of land, the person may bring an individual action against the seller in an appropriate court to recover damages or to obtain equitable relief. The court shall award reasonable attorney fees to the prevailing party in an action under this section.

(2) If the seller of a unit of land that was not lawfully established is a county that involuntarily acquired the unit of land by means of foreclosure under ORS chapter 312 of delinquent tax liens, the person who purchases the unit of land is not entitled to damages or equitable relief.