Colorado Code
Part 6 - Registration, Enforcement, and Modification of Support Order
§ 14-5-608. Confirmed Order

Confirmation of a registered support order, whether by operation of law or after notice and hearing, precludes further contest of the order with respect to any matter that could have been asserted at the time of registration.
Source: L. 93: Entire article R&RE, p. 1599, § 1, effective January 1, 1995. L. 2015: Entire part amended, (HB 15-1198), ch. 173, p. 558, § 31, effective July 1.
COMMENT
If, after notice, the nonregistering party fails to contest, the registered support order is confirmed by operation of law and no further action by a responding tribunal is necessary. Although the statute is not explicit on the subject, it seems likely in the absence of a contest both the registering and nonregistering party would be estopped from subsequently collaterally attacking the confirmed order, whether on the basis that "the wrong order was registered" or otherwise.
If contested, a registered support order must be confirmed by the responding tribunal if, after a hearing, the defenses authorized in Section 607 are rejected. Thus, either scenario precludes the nonregistering party from raising any issue that could have been asserted in a hearing. Confirmation of a support order, whether by action or as the result of inaction, validates both the terms of the order and the asserted arrearages.
Related to Convention: art. 22. Grounds for refusing recognition and enforcement; art. 26. Procedure on an application for recognition.

Structure Colorado Code