Legal Question in Family Law in Nevada

Your question is too vague to answer with certainty. If it is a Nevada order (each state has its own rules) there is no statute of limitations for child support accruing after July 1, 1981. On there other hand, there are some equitable defense, such as laches and waiver, which may apply. Pretty much all the relevant law is set out in detail at http://www.willicklawgroup.com/child_support.

There is statute that says that if arrears exist when a child emancipates, payments continue to be due at the same rate until all arrears are paid. And there is interest, and penalties, also payable.