Oregon Revised Statutes Domestic Relations § 109.470

(1) When an adoptee reaches age 18, a birth parent of the adoptee, if the birth parent registered with the registry before the adoptee was age 18, shall notify the registry in writing only if the birth parent does not desire to continue the registration.

(2) When an adoptee reaches age 18, a putative father of the adoptee, if the putative father registered with the registry before the adoptee was age 18, shall notify the registry in writing only if the putative father does not desire to continue the registration.

(3) When an adoptee or genetic sibling of an adoptee reaches age 18, the adoptee or sibling, if the parent or guardian of the adoptee or sibling registered with the registry before the adoptee or sibling was age 18, must reregister with the registry as an adult in accordance with ORS 109.460. If the adoptee or sibling reregisters, the registration fee will be waived.

(4) A registry shall notify a birth parent, putative father or parent or guardian of a minor adoptee or of a minor genetic sibling of an adoptee of this requirement when the birth parent, putative father or parent or guardian initially registers.