Under the Revised Uniform Reciprocal Enforcement of Support Act (RURESA), an order for support issued by the family court in one state will be enforced by the family court in another state to which the paying parent moves if certain conditions are met. Under RURESA, the custodial parent has two options for how to proceed to collect support.

Under the first option, the custodial parent who receives the support must register the order for support in the county where the payer parent now lives. The family court in that county can provide information on the proper registration procedure. That court will then move to enforce the order and make the non-custodial parent pay. The payer parent can, however, go to court in his or her new home state and argue that the child support amount should be modified downward, and if he or she is successful, the child's home-state court is stuck with the reduced amount. A newer interstate support act called the Uniform Interstate Family Support Act, which has been adopted in some states, does not allow the court in the new home state to modify the original court's support order.

Alternatively, the custodial parent can go to the family court in his or her home state to commence an action to enforce the support award issued by that court. The enforcement agency that serves that court will then notify the payer's new home state so that enforcement actions, such as wage withholding, can be implemented there. Under this method, the payer cannot get the award modified in his or her new home state. The new state's court can, however, determine that the amount of child support ordered is too high and require that only a portion of it be paid, but the original state does not have to accept the reduced amount. The payer remains liable for the full amount as originally ordered, and if he or she fails to pay it, the original state may issue an arrest warrant, and the delinquency can show up on the payer's credit report.