He has the right to sign the birth certificate. Apart from that he has no right at the birth. The mother is the patient and she decides what goes.
The authorized birth certificate may refer to the Original birth certificate rather than the Copy of the Birth Certificate.
The document number should be on either the top left or top right corner of your birth certificate. If you do not have a copy of your birth certificate, you will have to request one from the state you were born in.
Why would you want to sign a birth certificate?
No. Birth and Adoption certificate are different
Yes of course he does assuming that he is the real dad.
Yes
You haven't explained whose birth certificate. If it's her biological child then she must sign the birth certificate. The biological parents of the child sign the birth certificate.
It depends on the state. In some states, a father who is unmarried to the mother acquires legal rights by signing the birth certificate. In other states, signing the birth certificate conveys no legal right, and the father still must proceed with a legitimation or paternity proceeding in order to become the legal father.
A birth certificate is a legal document showing that a person's birth occurred and has been registered within the jurisdiction of the agency issuing the birth certificate.
Whose birth certificate?
Yes.