 All of these print human readable content on paper ballots, but in several cases, these machines follow the Populex model by adding a machine-readable bar code.Voters cannot easily verify that the bar code matches the human-readable print, but in an audit, a hand count of the human-readable ballots can be compared with a machine count of the bar-coded content to verify that the electronic ballot marker was honest.It has been noted that the information incorporated into the barcode or QR code may not match the human-readable information printed on the ballots, and it would be impossible to determine if that is the case without audits by computer coding specialists.