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 suppression
In Australia, it is mandatory for citizens to enroll to vote and it is their responsibility to update their enrollment when they change their address. Even so, it is estimated that about 6% of eligible Australian voters are not enrolled, or are enrolled incorrectly. These are disproportionately younger voters, many of whom might neglect to enroll when they attain voting age.