Colorado Code
Part 1 - General Provisions
§ 14-13-109. Appearance and Limited Immunity

Source: L. 2000: Entire article R&RE, p. 1522, § 1, effective July 1.
This section establishes a general principle that participation in a custody proceeding does not, by itself, give the court jurisdiction over any issue for which personal jurisdiction over the individual is required. The term "participate" should be read broadly. For example, if jurisdiction is proper under part 2, a respondent in an original custody determination, or a party in a modification determination, should be able to request custody without this constituting the seeking of affirmative relief that would waive personal jurisdictional objections. Once jurisdiction is proper under part 2, a party should not be placed in the dilemma of choosing between seeking custody or protecting a right not to be subject to a monetary judgment by a court with no other relationship to the party.
This section is comparable to the immunity provision of UIFSA § 314. A party who is otherwise not subject to personal jurisdiction can appear in a custody proceeding or an enforcement action without being subject to the general jurisdiction of the State by virtue of the appearance. However, if the petitioner would otherwise be subject to the jurisdiction of the State, appearing in a custody proceeding or filing an enforcement proceeding will not provide immunity. Thus, if the non-custodial parent moves from the State that decided the custody determination, that parent is still subject to the state's jurisdiction for enforcement of child support if the child or an individual obligee continues to reside there. See UIFSA § 205. If the non-custodial parent returns to enforce the visitation aspects of the custody determination, the State can utilize any appropriate means to collect the back-due child support. However, the situation is different if both parties move from State A after the determination, with the custodial parent and the child establishing a new home State in State B, and the non-custodial parent moving to State C. The non-custodial parent is not, at this point, subject to the jurisdiction of State B for monetary matters. See Kulko v. Superior Court , 436 U.S. 84 (1978). If the non-custodial parent comes into State B to enforce the visitation aspects of the determination, the non-custodial parent is not subject to the jurisdiction of State B for those proceedings and issues requiring personal jurisdiction by filing the enforcement action.
A party also is immune from service of process during the time in the State for an enforcement action except for those claims for which jurisdiction could be based on contacts other than mere physical presence. Thus, when the non-custodial parent comes into State B to enforce the visitation aspects of the decree, State B cannot acquire jurisdiction over the child support aspects of the decree by serving the non-custodial parent in the State. Cf. UIFSA § 611 (personally serving the obligor in the State of the residence of the obligee is not by itself a sufficient jurisdictional basis to authorize a modification of child support). However, a party who is in this State and subject to the jurisdiction of another State may be served with process to appear in that State, if allowable under the laws of that State.
As the Comments to UIFSA § 314 note, the immunity provided by this section is limited. It does not provide immunity for civil litigation unrelated to the enforcement action. For example, a party to an enforcement action is not immune from service regarding a claim that involves an automobile accident occurring while the party is in the State.

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