[faucetman]

This is a red herring. No one is proclaiming as fact that the document that the SCAN was made from is a forgery. Of course you would have to examine the original. That said, why would a scan of that document have to be altered if the underlying document was legit? Why alter the name on it if the name really was Obama’s?

[Non-Sequitur]

No one is proclaiming as fact that the document that the SCAN was made from is a forgery.

Where have you been? There is a whole cottage industry of "experts" who proclaim the document is a forgery. And others who proclaim it to be genuine. You've got some catching-up to do.