What is the name of your state? LA
My brother in law was ordered to pay child support for his daughter. At the time, Georgia garnished his income taxes to go toward the arrears. However, the custodial parent went to child support enforcement and had them drop her case. At that point, they refunded the money they had taken from him. The mother dropped the case because they made an agreement on what he would pay her and his has paid that much, sometimes more, every since.
Now she is upset because she wants more money and is threatening to go back to child support and force him to pay the back payments from when she dropped the case. Can she do that? He has cancelled checks from all his payments to her. He has not been hiding or trying to get out of his responsibility at all.
Their relationship has been really good up until this point. She has a tax preparation service and he allowed her to prepare his taxes and recommended her to others in the family. She even prepared our taxes! She just became upset recently because she wants more money (like $300/month more) and he can't really afford to pay it.
It just doesn't seem fair that they will tell him he's no longer obligated and to just keep doing what he is doing as far as sending the checks and then come back a year later and have him owe back payments. I know she can have him start to pay from today forward if she chooses, but the back payments just don't seem right.