Oregon Revised Statutes Financial Institutions § 711.550

(1) If the Director of the Department of Consumer and Business Services rejects any claim in whole or in part, written notice of the rejection shall be given to the claimant, either in person or by mail. If notice by mail is given, it is sufficient that the notice be sent to the address indicated by the claimant on the proof of claim filed with the director. If no address is given, then it is sufficient if the notice is mailed to the last address of the claimant as shown by the books and records of the closed institution. If notice of rejection is given by mail, the notice is considered to have been given by the director on the day when the notice of rejection is properly addressed and deposited in the mail, postage prepaid. Proof of giving of notice of rejection by the director shall be made by affidavit, and the affidavit shall be prima facie evidence of the giving of notice. The affidavit shall be filed in the office of the director.

(2) Within 30 days after the giving of the notice of rejection, the claimant may appeal the rejection by serving the director with notice of appeal and by filing the notice with the clerk of the supervising court with proof of service of the notice upon the director and a copy, certified as correct by the director, of the rejected claim and the indorsement made thereon by the director.