2011 ORS § 311.205¹
Correcting errors or omissions in rolls
(1) After the assessor certifies the assessment and tax roll to the tax collector, the officer in charge of the roll may correct errors or omissions in the roll to conform to the facts, as follows:
(a) The officer may correct a clerical error. A clerical error is an error on the roll which either arises from an error in the ad valorem tax records of the assessor, or the records of the Department of Revenue for property assessed under ORS 306.126 (Appraisal of industrial property by department), or which is a failure to correctly reflect the ad valorem tax records of the assessor, or the records of the Department of Revenue for property assessed under ORS 306.126 (Appraisal of industrial property by department), and which, had it been discovered by the assessor or the department prior to the certification of the assessment and tax roll of the year of assessment would have been corrected as a matter of course, and the information necessary to make the correction is contained in such records. Such errors include, but are not limited to, arithmetic and copying errors, and the omission or misstatement of a land, improvement or other property value on the roll.
(b) The officer may correct an error in valuation judgment at any time in any account when an appeal has been filed in the tax court alleging that the value on the roll is incorrect, if the correction results in a reduction of the tax owed on the account. Corrections under this paragraph to accounts appraised by the department pursuant to ORS 306.126 (Appraisal of industrial property by department) and 308.505 (Definitions for ORS 308.505 to 308.665) to 308.665 (Railroad car exemption) may not be made without the approval of the department. Errors in valuation judgment are those where the assessor or the department would arrive at a different opinion of value. The officer may correct any other error or omission of any kind. Corrections that are not corrections of valuation judgment errors include, but are not limited to, the elimination of an assessment to one taxpayer of property belonging to another on the assessment date, the correction of a tax limit calculation, the correction of a value changed on appeal, or the correction of an error in the assessed value of property resulting from an error in the identification of a unit of property, but not an error in a notice filed under ORS 310.060 (Notice certifying taxes).
(c) The officer shall make any change requested by the Department of Revenue which relates to an assessment of property made by the department under ORS 308.505 (Definitions for ORS 308.505 to 308.665) to 308.665 (Railroad car exemption).
(d) The officer shall make any change ordered by the tax court or the Department of Revenue under ORS 305.288 (Valuation changes for residential property substantial value error or for good and sufficient cause) (1) to (6) or 306.115 (General supervision over property tax system).
(e) The officer shall make any change required under ORS 308A.089 (Requalification of disqualified nonexclusive farm use zone farmland).
(2)(a) The officer in charge of the roll shall make corrections with the assent and concurrence of the assessor or the department. The direction for the correction shall be made in writing and state the type of error and the statutory authority for the correction. Corrections may be made to the roll for any year or years not exceeding five years prior to the last roll so certified.
(b) Any additional taxes resulting from corrections for years prior to the current year shall be deemed assessed and imposed in the particular year or years as to which the corrections apply. Addition of tax to a prior years tax roll, due to corrections under this section, shall not be considered in calculating the effect of the tax limitation under section 11b, Article XI of the Oregon Constitution for the current year.
(3) A correction made pursuant to this section shall be made in whatever manner necessary to make the assessment, tax or other proceeding regular and valid. The correction shall be distinguishable upon the roll, shall include the date of the correction and shall identify the officer making the correction. Whenever a correction is to be made after the assessor has delivered the roll to the tax collector, the effect of which is to increase the assessment to which it relates, except where made by order of the department, the procedure prescribed in ORS 311.216 (Notice of intention to add omitted property to rolls) to 311.232 (Mandamus to require placing omitted property on roll) shall be followed; and the provisions therein with respect to appeals shall likewise apply.
(4) Corrections which would result in less than a $1,000 change in assessed value or real market value shall not change the value for purposes of computing the taxes levied against the property, but shall be made only for purposes of correcting the office records.
(5) The remedies under this section are in addition to other remedies provided by law. [Amended by 1953 c.26 §2; 1957 c.324 §8; 1959 c.181 §2; 1961 c.234 §1; 1963 c.267 §1; 1965 c.344 §16; 1971 c.472 §3; 1973 c.402 §28; 1977 c.606 §2; 1979 c.687 §3; 1983 c.605 §5; 1991 c.459 §231; 1993 c.18 §73; 1993 c.270 §54; 1995 c.79 §146; 1995 c.127 §4; 1997 c.541 §278; 1999 c.21 §27; 2001 c.509 §2; 2007 c.590 §2]