High numbers of invalid ballots, overvoting or undervoting are other potential indicators.

There were 3 million invalid ballots; the large number was cited as the cause for the difference between the exit poll results and the official count.

Moreover, any racial disparity in invalid ballots stems from voter error.

He added, however, that he was disturbed by the number of invalid ballots from predominantly Democratic precincts.

Nonetheless, 3.3 million voters submitted 'invalid' ballots to protest against the regime.

The most recent rate of invalid ballots for two systems is as follows:

(Any other mark or comment on the paper renders it an invalid ballot.)

There were also 10 votes against the motion and three invalid ballots.

The problem of the invalid ballots arose when election officials found that many ballots had been punched twice.

There were 1,089 votes for him, 583 against and 113 invalid ballots.