ORS 305.810: Verification of return, statement or document filed under tax laws.

Any return, statement or other document required to be filed under any provision of the laws administered by the Department of Revenue, in lieu of any oath otherwise required, shall:

      (1) Contain or be verified by a written declaration that it is made under penalties for false swearing; or

      (2) Be verified, by such other means as the department may prescribe by rule, that it is made under penalties for false swearing.