Or. Rev. Stat. § 316.747
(1) Except as provided in subsection (2) of this section, in addition to any other modification to federal taxable income under this chapter there shall be added to federal taxable income the amount of any charitable contribution that:
(2) Charitable contributions described in subsection (1) of this section shall not be added to federal taxable income if the taxpayer provides to the Department of Revenue a written document that the taxpayer received from the organization to which the contribution was made that:
[2013 c.260 §7]