Compulsory voting
Compulsory voting is increasingly resented by citizens in some countries such as Brazil, the largest country where compulsory voting is enforced: at the last presidential election in 2014, some 30 million voters, about 21% of registered voters, did not vote, despite the fact that Brazil has some of the most severe penalties enforced against non voters.
Elections in Greece
Compulsory voting is the law in Greece but is not enforced. In the past a citizen had to present an up-to-date election booklet in order to be issued a driver licence or a passport, or else justify why they did not vote (e.g. because of absence, infirmity, or advanced old age). Nowadays the civic duty of voting is still considered "mandatory" but there are no sanctions for failing to vote. Turnout is usually high, typically between 70 and 80% for legislative elections and slightly lower for local administrative and European Parliament ones.