Oregon Revised Statutes Public Financial Administration § 293.265

(2) The deposit by or on behalf of the state under the approval or supervision of any state agency of a check marked “paid in full,” “payment in full,” “full payment of a claim” or words of similar meaning does not establish an accord and satisfaction that binds the state or prevents the collection of the remaining amount owed upon the obligation unless an officer or employee with actual authority to settle claims has agreed in writing to accept the check as full payment of a disputed obligation.

(3) Notwithstanding the provisions of subsection (1) of this section, subject to limits on amount adopted pursuant to subsection (4) of this section, a state agency may return any bank check or money order received by the state agency, whenever such bank check or money order is incomplete or the report or record applied for is not available or releasable or the payment is not owed. The state agency shall keep a record of the check or money order returned, in the form prescribed by the Oregon Department of Administrative Services.

(4) After consultation with the State Treasurer, the department shall by rule limit the return, by a state agency, of a bank check or money order under subsection (3) of this section to checks or money orders of less than the amount specified in the rule.

(5) As used in this section, “state agency” means any state officer, board, commission, corporation, institution, department or other state organization whose costs are paid wholly or in part from funds held in the State Treasury.