Wow! I never knew divorce papers proved paternity!
http://whatreallyhappened.com/IMAGES/ObamaBirthStarBulletin.jpg
You mean the photoshop image on the net and the newspaper adds that the grandparents called in?
Evidently you have never been divorced. Paternity is established in divorce cases for the purposes of Child support. Proof of responsibility comes from birth certificates, which was page 11 in the divorce decree, which lists the father and mother.
In adoption cases, birth fathers are named as they have to relinquish custody for an adoption to take place. Also they may contest an adoption, and the courts have a responsibility to notify the father. If they do not have an address, they have to “notify by publication”, in the last known town the father was known to live, to satisfy law, if a father comes back to court in protest.