Oh and I forgot. Check out your local Births Deaths and Marriages (state level) as to whether you can just nominate him as the father and he has to "opt out". Some states have "opt in" where the Father has to sign the certificate, some have "opt out" where you nominate him, they send him a letter and if he doesn't respond within a set time then he is nominated as the father and HE has to do something to have his name removed from the birth certificate. I can't remember which state you're in or whether it's opt in/opt out, so check again with your independent legal professional.

Hope this helps.