Compulsory voting
, 22 countries were recorded as having compulsory voting. Of these, only 10 countries (additionally one Swiss canton and one Indian state) enforce it. Of the 30 member states of the Organisation for Economic Co-operation and Development, 10 had forms of compulsory voting.
Mandatory referendum
The mandatory referendum (, , , ) is an instrument of direct democracy in Switzerland. It is a mechanism that holds mandatory votation of some decisions of the federal, cantonal, or municipal parliament and/or government, such as modifications of the Constitution or adhesion to supranational communities on a federal or cantonal level, or for example substantial financial decisions decreed by cantonal and/or communal executive and/or legislative bodies.