There are systems where the ballot itself isn't special, but the envelope you use is. Because of that there's no need to account for the ballots themselves. Pol

There are systems where the ballot itself isn't special, but the envelope you use is. Because of that there's no need to account for the ballots themselves. Poll workers never interact with your vote, you place the filled envelope in the ballot box, just like dropping off mail-in ballots work here.