Can my ex-wife bring me to court for child support after waving it.

Child support is not a right that belongs to the parents, it is a right that belongs to the child and therefore cannot be waived by a parent.  It is not something a person can contract their way out of.  While people may often forgo asking for it in a divorce, they can always come back later and request it.  So basically, the waiver you both signed is legally unenforceable. This answer is given in accordance with the laws of Virginia and may not be applicable in any other state.  It should not be construed as legal advice, as that would require a more thorough analysis of all of the facts involved in a specific case.  If you need further information or assistance, please feel free to contact my office for a consultation. Case results depend upon a variety of factors unique to each case. Case results do not guarantee or predict a similar result in any future case.