ORS 109.075: Binding effect of determination of parentage.

(1) Except as otherwise provided in subsection (2) of this section:

      (a) A signatory to an acknowledgment of parentage is bound by the acknowledgment as provided in ORS 25.554, 109.070, 109.072 and 432.098; and

      (b) A parent to an adjudication of parentage by a court acting under circumstances that satisfy the jurisdiction requirements of ORS 110.518 and any individual who received notice of the proceeding are bound by the adjudication.

      (2) A child is bound by a determination of parentage only if:

      (a) The determination was based on an unrescinded acknowledgment of parentage and the acknowledgment is consistent with the results of genetic testing;

      (b) The determination was based on a finding consistent with the results of genetic testing and the consistency is declared in the determination or otherwise shown;

      (c) The child was conceived by assisted reproduction, including under a gestational surrogacy agreement, and the determination of parentage was made under ORS 109.206 to 109.218 or 109.222 to 109.244; or

      (d) The child was a party or was represented by an attorney in the proceeding.

      (3) In a proceeding for dissolution, annulment or legal separation, the court is deemed to have made an adjudication of parentage of a child if the court acts under circumstances that satisfy the jurisdiction requirements of ORS 110.518 and the final judgment:

      (a) Expressly identifies the child as a “child of the marriage” or “issue of the marriage” or includes similar words indicating that both spouses are parents of the child; or

      (b) Provides for support of the child by a spouse unless that spouse’s parentage of the child is disclaimed specifically in the judgment.

      (4) Except as otherwise provided in subsection (2) of this section or ORS 109.070, a determination of parentage may be asserted as a defense in a subsequent proceeding seeking to adjudicate parentage of an individual who was not a party to the earlier proceeding.

      (5) A party to an adjudication of parentage may challenge the adjudication only under ORS 109.072.