by advent » Sun Jul 22, 2012 4:08 am
Just wanted to say, not sure where the other answers are getting their legal information, but adult children can sue for back child support, but only if the custodial parent never did. My mom refused to bother with it, but when my brother turned 18 and I was 20, we did it since it was $380000 by then. It's now paying the last of his college, covering my medical bills from a few years ago, and we gave the remainder to our mother to pay off the lean on her house that was his fault.
Unfortunately, your mom has already set up for the payments and claimed it herself so you cannot claim it. However, you do need to take her to court over the money she owes you. She is quite selfish.