If money can be counterfeited, anything can.
I never had an original birth certificate, just a form signed by a town clerk my folks needed for something or other. It was good enough to get a passpot with, though.
A couple years ago the US Army required proof of citizenship from Boeing for all employees. Original birth certificates only, no photostats, not even my expired passport would do.
I signed an authorization and Boeing got me a real birth certificate, showed it to the Army and mailed it to me, no charge. Now I know, if I stub my toe, that's real pain....I have the papers to prove it.