How do I remedy back support owed for an adult child that isn't mine?

At the time of our divorce when support was ordered I did not have any knowledge that the child wasn't mine. It was kept secret from me

IAt the time that support was ordered I had no knowledge that the child was't mine. I found out years after the divorce. We were divorced in 1991.

That is why anytime you go through a divorce and children are involved - unless you want to carry the burden of child support through the years - you ask the court to conduct paternity tests. Many mothers have lied and or kept secrets - and still do. But once you accept the child as yours and do not ask for the paternity test - you have accepted the child as your own without the requirement of proof..

That's a terrible law. It seems that since new evidence was brought before the court, the prior ruling would have to be overturned. Not doing this is almost the equivalent of DNA evidence produced to free a convicted murderer and the court saying its too late for that. I don't question the law as I don't know it, but I would challenge this to the Supreme Court, a judge should never say "It's too late" --especially when hard evidence reveals a different truth. I say it's never to late to get it right.