On 22 February 2013 procedural measures had been implemented to prevent multiple voting.

To prevent multiple voting, the passports of voters were stamped on page 17.

Some ballot papers have been coated with waxy surfaces to prevent voting for certain candidates.

Violence and insecurity could prevent voting in some areas.

Electoral stain is used as a good security feature to prevent double voting in elections.

The ruling was required, he said, to prevent double voting.

This practice has been followed since the 1962 general elections to prevent bogus voting.

Others were threatened with physical violence, false charges, and other extreme danger to prevent voting.

These proposals also include additional checks on nationality to prevent multiple candidature and voting.

In rural regions where opposition groups prevented voting.