Oregon Revised Statutes Commercial Fishing and Fisheries § 508.445

In all prosecutions requiring proof as to the issuance or nonissuance of a license by the State Fish and Wildlife Director under any of the laws of this state, the certificate of the director as to the issuance or nonissuance of the license by the director shall be sufficient proof on that question to establish the fact. This certificate shall be admitted in evidence as to the issuance or nonissuance of the license in any such prosecution.