When a judgment is not final, there is a problem of registering that judgment in another court, because normally a judgment must be final before it can be registered. The Second Restatement states, under the topic of Defenses to Recognition and Enforcement, that a judgment rendered in one state need not be recognized or enforced in a sister state insofar as the judgment remains subject to modification in the state of rendition either as to sums that have accrued and are unpaid or as to sums that will accrue in the future. A court is free to recognize or enforce a judgment that remains subject to modification under the local law of the state of rendition. Child support orders are considered judgments of this sort.