Well, I didn't get the vaccine, but I have an official CDC logoed card from a clinic that says I did.
A Google search for blank cards, a sheet of semi card stock paper for 50 cents from office Depot, quick print job, someone else to fill it in so it's not in my hand writing, 2 colored pens so it looks like it written by someone else on both vaccine dates and I was good to go.
If my work says we have to get it and enough people refuse I'll be right there with them, if not I'll pull out my vaccine card.
I work where it's a production facility. There are too many hardworking red blooded people there though that won't tolerate it, if they tried to force it the place would need to shut down and they can't afford that. When we have to shut down for some reason it's a big one because we lose about 25,000 to 28,000 dollars an hour we aren't running.