Article IV, Section 1 of the United States Constitution, the Full Faith and Credit Clause, addresses the duties that states within the United States have to respect the "public acts, records, and judicial proceedings of every other state." According to the Supreme Court, there is a difference between the credit owed to laws as compared to the credit owed to judgments.
While a "regular" state court judgment is generally enforceable in all "Sister" states, UIFSA streamlines the process for family/matrimonial support judgments. With that in mind, interstate support enforcement is complicated. Take care in selecting your partner in this process.
Otherwise known as the Hague Child Support Convention. These countries are signatories to the Hague Convention on the International Recovery of Child Support (HCIRCS). The Hague Child Support Convention is a multilateral treaty governing the enforcement of judicial decisions regarding child support and other forms of family support. This is a complex area of support enforcement. As with any other complex family and matrimonial law issue, it is critical that you choose counsel that can work with you in the most effective and efficient manner.