take it one step further and make a website where anyone can look up the secret id, see how the ballot was counted per candidate and open a scanned copy of the ballot to make auditing the vote a job anyone can do. a serial number or secret id would also prevent ballots from being counted twice. also show the number that the ballot counted towards for each candidate (ex. this ballot is vote #546 for candidate a out of 1938 votes for candidate a).
United States