Oregon Revised Statutes Mineral Resources § 517.280

The co-owners who performed the assessment work may file with the county clerk of the county where the mine is situated, their affidavits that the payment has not been made. Upon the filing of such affidavits, the clerk shall record the notice, proof of service and affidavits in the Mineral and Mining Record. The clerk shall then and there issue to the co-owners who performed or caused to be performed the assessment work, a certificate to the effect that the clerk has recorded the notice, proof of service and affidavits of nonpayment, and that the co-owners who performed or caused to be performed the assessment work have become and are the owners of all the right, title and interest of the delinquent co-owner or co-owners of the property.