It’s not that easy. When I told the local county elections office where we used to live in Florida that our father had died, and I called in for 6 years in a row, they kept insisting that they were not allowed to just take someone’s word for it, but needed an actual death certificate mailed in. The only provision they have is to make someone “inactive status” after not voting for at least two general elections (i.e. a 6-year cycle). I refrained from mailing in such a certificate since I wanted to track how many years it would take. And since it was a Republican heading the office, I had no fear of someone voting in his name.
We went by there with a death certificate. I can’t remember if we had to leave a copy or if they just made a copy but yes you do have to have proof.