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.
Compulsory voting
Supporters of compulsory voting also argue that voting addresses the paradox of voting, which is that for a rational, self-interested voter, the costs of voting will normally exceed the expected benefits. The paradox disproportionately affects the socially disadvantaged, for whom the costs of voting tend to be greater. Australian academic and supporter of compulsory voting, Lisa Hill, has argued that a prisoner's dilemma situation arises under voluntary systems for marginalised citizens: it seems rational for them to abstain from voting, under the assumption that others in their situation are also doing so, in order to conserve their limited resources. However, since these are people who have a pronounced need for representation, this decision is irrational. Hill argues that the introduction of compulsory voting removes this dilemma.