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.
Get out the vote
"Get out the vote" (or "getting out the vote"; GOTV) describes efforts aimed at increasing the voter turnout in elections. In countries that do not have or enforce compulsory voting, voter turnout can be low, sometimes even below a third of the eligible voter pool. GOTV is generally not required for elections when there are effective compulsory voting systems in place, other than perhaps to register first time voters.