Thanks for checking on this :)
The BC would take care of citizenship and proof of age... BC not baptism certificate, although baptism cert once was OK to use for proof of age for driving licences at one time... a friend of mine used hers for age verification for D/L.
Not sure if baptism certs were OK for proof of voting age.
But BO may not have a baptism certificate from when he was a baby.
I believe Obama was baptized for the first time by Rev Wright about 20 some years ago. There should be no baptism records from his childhood (he was also very likely a muslim until his baptism by Rev Wright).