You should be able to tell Facebook they passed away, and turn it to a memorial page.
That’s what I tried to do, and that’s when it said to submit evidence. I was like, “uh, the evidence is that I was there when it happened and you can see from the profile that it’s for a DOG,” and they said that wasn’t good enough. I just gave up. Her profile will outlast all of us, probably.
I’d kinda hope that they don’t just take the word of any random person though - so much space for harassment otherwise
If the account is obviously active it’s pretty unlikely that they’re deceased. It wouldn’t take a lot of vetting. Although that probably is about 50 times more work than they would bother to put into it, so maybe you have a point.