Duplicate voting is prohibited.
- Multiple voting should be prevented effectively without, however, violating the principle of the secrecy of the vote.
- Multiple voting – where a voter casts more ballots than permitted – should be prohibited by law. Safeguards to prevent a person from voting again in the same or another polling station should be put in place. Examples of such safeguards include: marking the voter register to indicate an elector has voted, requiring the voter to sign the register, and marking a voter’s finger with ink.
- Checking that no opportunity exists to manipulate the voting process in the polling station, for example by switching boxes, fraudulent ballot papers, voting more than once, impersonation of another elector.
- Equality in voting rights requires each voter to be normally entitled to one vote, and to one vote only. Multiple voting, which is still a common irregularity in the new democracies, is obviously prohibited – both if it means a voter votes more than once in the same place and if it enables a voter to vote simultaneously in several different places, such as his or her place of current residence and place of former residence.