It should be simple and required by law to remove someone from the voter rolls after they are deceased. I’ve been part of a project for a different use case in my careeer, but it involved flagging customers who fit a certain profile.
You can do the same thing with deceased people. It can be done monthly, but it’s not that hard and should be something that governments are forced to do.
Of course any democrat controlled government will cry racism and voter rights over just making sure dead people don’t vote.
The USPS NCOA database is the key. Bought and paid for, why won’t they use it?