You know, I don’t know anything about getting divorced but is there some standard of proof of a condition before granting a resolution, in a court of law?
I don't know either, but others have said no proof of marriage is required to get a divorce.
In those days common law marriages were more usual, there'd be no paperwork, but a divorce was still required to end one. Still is in Texas, where you have to be real careful cohabitating, or you'll find yourself married without intending to be.