Oregon Revised Statutes Counties and County Officers § 215.513

(1) A mortgagee, lienholder, vendor or seller of real property who receives a mailed notice required by this chapter shall promptly forward the notice to the purchaser of the property. Each mailed notice required by this chapter shall contain the following statement: “NOTICE TO MORTGAGEE, LIENHOLDER, VENDOR OR SELLER: ORS CHAPTER 215 REQUIRES THAT IF YOU RECEIVE THIS NOTICE, IT MUST PROMPTLY BE FORWARDED TO THE PURCHASER.”

(2) Mailed notices to owners of real property required by this chapter shall be deemed given to those owners named in an affidavit of mailing executed by the person designated by the governing body of a county to mail the notices. The failure of a person named in the affidavit to receive the notice shall not invalidate an ordinance. The failure of the governing body of a county to cause a notice to be mailed to an owner of a lot or parcel of property created or that has changed ownership since the last complete tax assessment roll was prepared shall not invalidate an ordinance.