Child support is established in proceedings in which the court has personal jurisdiction over both parties, i.e. the mother and father. For post-divorce obligations, this may be the "inter parte" divorce proceeding itself, where the issues become "res judicata" and entitled to full faith and credit. Under the United States Constitution Article Four, full faith and credit shall be given in each state to the public acts, records and judicial proceedings of every other state. Courts therefore may use the full-faith-and-credit article to enforce final judgments that have been registered within another state.