Ballots typically do have unique IDs usually on some part that is removed by the voter. The problem is that isn't linked to anything because we don't want it linked to anything. This form of auditing isn't compatible with ballot secrecy. US elections do undergo rigorous process audits but the electorial process presents challenges to results audits.
Ballots typically do have unique IDs usually on some part that is removed by the voter. The problem is that isn't linked to anything because we don't want it linked to anything. This form of auditing isn't compatible with ballot secrecy. US elections do undergo rigorous process audits but the electorial process presents challenges to results audits.