She will have to file for a modification of a court order custody/visitation/support, for all changes to be legal. At age 18, there is no longer a custody/visitation, as they are treated as an adult at that age. If the child goes on to college, support may continue (depends on your paperwork, the state you live in and other issues) either way, the child support continues at least until the child reaches 18 or leaves high school whichever is the later. She could get back child support for the time that the child has lived with her, normally it only goes back until the date the paperwork was filed at the court. As far as you going back now and asking for more support from a while back, the courts will look at it as I am now, and that is that you two are playing a "eye for an eye" game, she wants the support she is entitled to and you want to see if you get more out of her! They are going to say why are you waiting until now, you weren't worried about the money when you had the child, now you don't have the child and it's your turn to pay and you are trying to be a weasle. Sorry I know that sounded harsh, but that's excatly what it sounds like to me. Yes, she is entitled to the money, and you should be thankful that she hasn't gotten from you sooner, 10 months is a long time to go without it. How would you have felt if she didn't pay for all that time?! It just sounds like you are really mad about the child moving out of your home and now you are hurting the child by not supporting him. It's time to step up and pay what you need to be paying. If I were you, I would be making a good faith effort to start paying atleast some kind of payment for child support. Do it by check only (no cash, there's no proof that you paid if you pay by cash) in the memo, always write that it is for child support and for what week/month it is for. Keep a record of it in a note book, wth the check number and amount of the check so that you may have an easy reference. I'm sorry for the harshness, but you need to think of the child and his needs, not the money issue and your ex! Hope this helps. Good luck to you!

