Missouri Revised Statutes Title XXX. Domestic Relations § 452.725. Appearance and limited immunity

1. A party to a child custody proceeding who is not subject to personal jurisdiction in this state and is a responding party under sections 452.740 to 452.785, a party in a proceeding to modify a child custody determination under sections 452.740 to 452.785, or a petitioner in a proceeding to enforce or register a child custody determination under sections 452.850 to 452.915 may appear and participate in such proceeding without submitting to personal jurisdiction over the party for another proceeding or purpose.

2. A party is not subject to personal jurisdiction in this state solely by being physically present for the purpose of participating in a proceeding under sections 452.700 to 452.930. If a party is subject to personal jurisdiction in this state on a basis other than physical presence, the party may be served with process in this state. If a party present in this state is subject to the jurisdiction of another state, service of process permissible under the laws of the other state may be accomplished in this state.

3. The immunity granted by this section shall not extend to civil litigation based on acts unrelated to the participation in a proceeding under sections 452.700 to 452.930 committed by an individual while present in this state.