People will write the number from the scanner wrong.
These things should NEVER be networked, certainly not thru the internet, and as long as they are not there will be errors.
Too few to matter. A insignif price to pay to have them non networked.
Humorous item from the video at one of the Wisconsin counties.
An absentee vote was sent in. All was proper with it. But a phone call came in (this is apparently NOT unusual) to inform the clerk’s office the voter died after mailing the ballot, but 3 days before Election Day.
They rejected the ballot, after confirming the death of the voter via mortuary out of state.