Electronic voting machine

In an optical scan voting system, or marksense, each voter's choices are marked on one or more pieces of paper, which then go through a scanner.

Voting data are recorded in memory components, and can be copied out at the end of the election.

For machines with VVPAT, checking is more expensive than with paper ballots, because on the flimsy thermal paper in a long continuous roll, staff often lose their place, and the printout has each change by each voter, not just their final decisions.

[5] Problems have included public web access to the software, before it is loaded into machines for each election, and programming errors which increment different candidates than voters select.

[2] The Federal Constitutional Court of Germany found that with existing machines could not be allowed because they could not be monitored by the public.