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.
Voter turnout
In Luxembourg voting is compulsory, too, but not strongly enforced. In Luxembourg only voters below the age of 75 and those who are not physically handicapped or chronically ill have the legal obligation to vote.