I’m curious. If a man and a woman stand in front of a secular figure like a judge, say some oaths that do not involve God, and register a piece of paper, what have they actually done? Are they “married”? If so, what does that even mean? I have never understood atheistic or non-religious or whatever the term is “marriage”. What is the point? I mean for the individuals, not the state. That’s a separate question.
I guess the answer is: who all could or might ask you for a copy of your marriage certificate? Proof? The IRS? An employer? An adoption agency? Any others?