<P> A Greek national does not usually lose their Greek citizenship when they obtain another nationality unless they specifically request it or in the rare case where a permit for citizenship was granted for by the Greek government to that citizen and they subsequently obtain the citizenship of another country . A Greek citizen may voluntarily renounce citizenship by submitting an application to the Ministry of Interior in Athens . For male Greek nationals, renunciation of citizenship is subject to the completion of their military duties . </P> <P> Although Greek citizens can acquire foreign nationality, some countries require citizens with foreign nationality to declare, at some point upon reaching adulthood, whether to keep their Greek or foreign nationality . For example, any dual Greek - Japanese citizen who, by birth, acquires the two nationalities, must choose, before reaching age 22, whether to keep the Greek or Japanese citizenship . The Japanese Minister of Justice may otherwise demand a declaration of choice of citizenship, to the dual Greek - Japanese national, at any time . </P> <P> Visa requirements for Greek citizens are administrative entry restrictions by the authorities of other states placed on citizens of Greece . In 2017, Greek citizens had visa - free or visa on arrival access to 171 countries and territories, ranking the Greek passport 6th in the world according to the Visa Restrictions Index . </P> <P> Greek citizens are also citizens of the European Union and thus enjoy rights of free movement and have the right to vote in elections for the European Parliament . </P>

Who qualified to be a citizen in greece