Answers
On
Mary Tsiganou answered:
If you have a passport and can issue a legal visa to enter the country, the procedure followed is the same as for any case of a residence permit by investment.
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Dimitris Foutsis answered:
If you do not have a passport, you cannot get a visa to enter Greece, so you cannot obtain residency.
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Stilianos Proestakis answered:
It is the exact same process.