My son is soon to be 12. Father and I, live in the same town and he communicated when it was convenient for him. He was never stable. I confronted father and ask for help financially. He automatically asked for visitations. This labor day weekend, he came and got him and never gave me the $40 we agreed on. Now he is asking for partial custody. Am I able to collect child support, after he files for custody and collect for the"back" child support for the past 11 years, that he did nothing.