Nobody really gives my argument much credibility, but I still think it best fits the available facts.
Yes, Obama's "birth certificate" is a legal document produced and supported by the state of Hawaii, and no, it's not his real birth certificate.
I suspect he doesn't actually have one. I suspect all he has is some records in state files, but not an actual valid proof of being born there.
President Eisenhower was a home birth in Denton, Texas and he never received a birth certificate. When Ike was in his 50’s he got a birth certificate issued on the notarized testimony of his wife and brother.
A birth certificate is “self-authenticating” under the Federal Rules of Evidence if it has the signature of a custodian and a seal or if it is testified to be authentic by its custodian.
In order to invalidate a birth certificate, probatve evidence of a birth somewhere else would need to be presented. If fraud or deception was done by Obama’s relatives in 1961, that would not impact him in the final month of his presidency in 2016.