My daughter is 16 yrs. My X never wanted child support by i have helped her when she needs it. Recently she told me that she receiver some child support papers & that i was going to have to pay child support. I have no problem with this but i have some questions. Do i have to pay backpay? If she never filed until now, do i pay backpay for the past 16 yrs? My daughter lives in Colorado with her mom. She does not want child support but she receiver paper work, what can we do if she does not want it?