Birth tourism
Some countries do not allow their citizens to renounce their citizenship or only if the citizenship was acquired by birth there to non-citizen parents. In Argentina, Brazil, Ecuador, Peru, and Uruguay, voting is compulsory for citizens. In Bolivia, Brazil, Chile, Colombia, Cuba, Guatemala, Paraguay, and Venezuela, military service is mandatory.
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.