I wasn't sure and found this. Sheds a lot of light on things as my daughters father - aka sperm donor - lives in another state and we've never been able to enforce him paying at all. Hopes this helps answer your question!
A lot of questions surrounding child-support regulations used to come up when the parents lived in different states. The Uniform Interstate Family Support Act has helped clear up a lot of the confusion.
Step 1:
Understand that most states have passed the Uniform Interstate Family Support Act, a law that lets courts in different states cooperate with each other and that clarifies what happens when the parties in a support case live in different states.
Step 2:
Know that before this law was passed there was a lot of confusion about child support. Sometimes courts in two different states would order child support payments and the parent would be responsible for paying under both orders.
Step 3:
Realize that under this law, the state where one parent and the child live has the power to issue a support order.
Step 4:
Recognize that, under this act, states cannot interfere with support orders made in the state where one parent and the child live.
Step 5:
Be clear on the fact that one state can modify another state's order only if neither of the parents nor the child live in the issuing state, or if both parents now live in the state where the modification is sought.
Step 6:
Ask the court for a determination of which order applies if you have more than one.
Step 7:
Consider that no matter where a support order is collected or enforced, it will be governed by the laws of the state in which it was issued.