@admitsWrongIfProven if you really wanted to, you could hold early drop-off/mail-in votes in their envelopes until election day, check the envelopes against recent death certificates, and throw away the (unopened) envelopes from voters who died. drop-off/mail-in votes are typically anonymous on the inside, but the outer envelope is identified and signed, so the voter can be checked against the voter roll (both as a valid voter, and to prevent multiple votes).