Oregon Revised Statutes Revenue and Taxation § 311.125

(1) If delinquent tax payments are to be posted to the previous year's rolls the tax collector shall enter on the roll received, for each property assessment, a memorandum of all taxes then unpaid and delinquent on such property, showing the tax year or years and the amount of such taxes for each such year. Where a continuing tax roll card system is used on which is shown the prior years' unpaid taxes, no new annual entry or entries need be made until a new card is used to replace the old card. Where the property description for an account in the current tax roll is different than the description of the property for a prior year, but includes a portion or all of the property on which the unpaid taxes are a lien, the full amount of the unpaid taxes shall be shown, and no segregation of the value of the property need be made unless requested pursuant to ORS 311.280 by a person desiring to pay a portion or all of such unpaid taxes.

(2) If delinquent tax payments are to be posted to the current tax roll, the tax collector shall enter on the roll received, for each property assessment, all taxes then unpaid and delinquent on such property, showing the tax year or years and the amount of such taxes for each such year. A segregation of value of the property and of the unpaid taxes applicable to each portion of the property segregated shall be made whenever the property description for an account on the current tax roll is different from a prior year or years, as described in subsection (1) of this section.