I need help with this I have 2 boys with my high school exgirl friend. I knew they didn't have my last name and was told there was nothing I could do about it. I do owe back child support on them that I have been paying on. They are in there twentys know. I went to help one of them get there birth certifcate and found out that Im not on the birth certifcate like I was told when they were born. Can I get something done?