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.
Voter registration
In the UK voter registration is compulsory, but the requirement to register is rarely enforced.
The current system of registration in the United Kingdom (UK), introduced by the Labour government, is known as rolling registration. Electors can register with a local authority at any time of the year. This replaced the twice-yearly census of electors, which often disenfranchised those who had moved during the interval between censuses.