Yes, I am well aware of death certificates; I have the death certificates for both of my parents. However, if there is not an official mechanism to remove their names from voter rolls, they may still be on the rolls.
If they are still on the voting rolls, someone could come in and vote on their behalf....with no voter ID, this is one of the methods of voter fraud.
Years ago...my father-in-law passed away at around 5AM on a Friday morning. This was Germany, and I was amazed at the process.
They asked my wife and the mother-in-law to come down and claim personal effects. We didn’t get to the hospital until 1130 that morning. He had been moved to the morgue. They needed a family member to sign the submission paperwork for him to be declared dead. But then they admitted this was Friday....thus the local city hall was shut down by 1:30 PM, and this paperwork would not get there in time to be stamped...so the body wouldn’t be released until Monday at the earliest.
Then I came to be told the whole process at the city hall. The guy would be moved to a special tax status. His voting record was terminated. There were various things done by the action of this death certificate.
Obviously, the Germans had thought about this and developed a pretty standardized list of things that must be done. I’m willing to bet...unless you have a heart attack within minutes after leaving the voting station....that’s about the only way that a guy in Germany could be declared dead and vote on the same day. Otherwise...a dead guy will absolutely never vote in Germany.