I don’t know what he used. I do know that a birth certificate is NOT needed to get a passport. Null and Void has posted the link to the state site repeatedly telling of the procedure to obtain one without a birth certificate.
Also, a family passport can be used per this post:
http://web.israelinsider.com/Articles/Politics/12993.htm
In the comments by a poster named muzhik:
Obama may never have had to produce his birth certificate to get a passport. As a baby, he would have been included in his mothers passport as a family passport. Whoever took her application may not have required her babys BC its the 60s, shes white, the daddys black, and its not like the kid will ever run for president. Sloppy by todays standards, but not necessarily by the standards of the time.
After that, its just a matter of keeping the passport renewed. When he turned 14, Obama would have gotten his own passport, using the family passport as proof of citizenship. If he kept his passport renewed, he never would have needed to produce a certified birth certificate.
Even an expired passport is valid proof of citizenship.
I ask simply because knowing that he used a BC as most Americans do would put an end to this line of idle speculation just as knowing that he had to use some other proof (such as naturalization docs) would strengthen the case.
It would seem that just asking the most obvious question makes some freepers nervous (not calpernia and bvw).
Grampa dave thinks I have an ulterior motive in asking, even though he says that he has asked the same question. What was your motive dave?
Null says that my posting history proves I'm a liberal. I ask him to prove it with my own words....he can start right after he kisses my Royal Irish Ass.