Oregon Revised Statutes Public Financial Administration § 294.120

(1) When authorized to use facsimile signatures by the governing body of any county, city, district organized for public purposes or any other public corporation or political subdivision of the state, any person authorized to sign any check, warrant or other instrument on behalf of the county, city, district, public corporation or political subdivision may, in the discretion of the person, sign the check, warrant or other instrument by facsimile signature affixed by rubber stamp or by any mechanical equipment or device.

(2) Where the use of facsimile signatures is authorized under this section, the holder or drawee of any check, warrant or other instrument bearing or purporting to bear a facsimile signature shall be under no duty to determine the authority of the person who affixed the facsimile signature to use facsimile signatures.