Compulsory voting
Countries that have compulsory voting by law but do not enforce it:Although voting in a country may be compulsory, penalties for failing to vote are not always strictly enforced. In Australia and Brazil, providing a legitimate reason for not voting (such as illness) is accepted. In Argentina, those who were ill on voting day are excused by requesting a doctor to prove their condition; those over away from their voting place are also excused by asking for a certificate at a police station near where they are. Belgian voters can vote in an embassy if they are abroad or can empower another voter to cast the vote in their name; the voter must give a "permission to vote" and carry a copy of the eID card and their own on the actual elections.
Electoral roll
Electoral rolls, under various names, are used in, for example, the United States, United Kingdom, Australia and New Zealand, but not all jurisdictions require voter registration as a prerequisite for voting, such as in the State of North Dakota in the United States. Most jurisdictions close updating of electoral rolls some period, commonly 14 or 28 days, before an election, but some American jurisdictions allow registration at the same time as attending a polling station to vote, and Australia closes the rolls 7 days after an election is called, rather than with reference to election day.