Serial numbers would be shuffled like a deck of cards and mailed or issued in random order.
The only thing they could trace is that they are part of the set that was officially printed................
In my state the bar codes are tied to the person voting that ballot. Have asked why to only get no answer thus in my state the ballot voted is tied to the person voting that ballot when one votes in person
“Serial numbers would be shuffled like a deck of cards and mailed or issued in random order.”
A few lines of code fixes all serial numbers to the voter. You want to give that to the government?