Oregon Revised Statutes Revenue and Taxation § 311.235

No ad valorem taxes imposed on real property, a manufactured structure or a floating home purchased by a bona fide purchaser shall be a lien on the real property, manufactured structure or floating home unless at the time of purchase the taxes were a matter of public record. For the purposes of this section, if the tax roll has not been prepared for the tax year in which the purchase occurred, taxes levied or to be levied for the tax year of purchase are taxes which are a matter of public record. A bona fide purchaser is an individual purchaser of a fee simple interest in a single property, who acquires the property in good faith, in an arm's-length transaction and for fair market value and adequate consideration.