Compulsory voting
Compulsory voting is an effect of laws which require eligible citizens to register and vote in elections, and may impose penalties on those who fail to do so. , 22 countries provide for compulsory voting, and 11 democracies — about 5% of all United Nations members — enforce it.
Right of foreigners to vote
A number of separate supranational groupings of countries exist, and membership in some of these groupings may involve multinational agreements and treaties in which member countries agree to some degree of reciprocity regarding voting rights. Some individual countries are members of more than one supranational groupings, and some supranational groupings of countries are members of other supranational groupings of countries.