In November 2003 in California a random selection of each electronic voting system was taken aside on the day of election, and careful parallel elections were conducted to show that the machines were completely accurate at recording votes.

• 2003年11月，加州在选举当天从每一款电子投票系统里随机选择一部机器保留不用，并且谨慎地同时使用各款机器进行选举，证明机器记录的选票完全正确。