Você não indica seu país de residência ou passaporte, mas, por exemplo, eu usei o Site da República Helênica (Grécia no Reino Unido) .
Se você olhar a página que eu vinculei, no parágrafo Documentos necessários, estão as seguintes informações:
• Supporting documents that clearly provide evidence of the following:
- Purpose of the intended journey (i.e. confirmation of flight/ferry bookings etc)
- Proof of accommodation (hotel bookings, original invitation letter dully signed by the host, whose signature needs to be verified by a Greek authority (police, honorary consulate etc). When the data regarding the host has not been verified by the authorities of the Member State dealing with the application, the applicant needs to present: A copy of ID card or bio data page of the host's passport; residence permit; proof of residence (property title deeds, rental agreements etc, proof of income).
- Proof of sufficient means of subsistence both for the duration of the intended stay and for the return to the UK (i.e. bank statements, minimum amount for the last three months (please note that the minimum amount of money you need to have for each day that you stay to Greece is 50 euros, credit card(s) account statement, travelers’ cheques, salary slips, registered proof of sponsorship and/or private accommodation).
- Proof of employment (this may be proved by a recent original certificate of employment/ pay slips/proof of social security contribution or for self employed applicants, an original letter from their accountant or the last tax return form ).
Como você pode ler no parágrafo 3, a Grécia quer ver prova de que você tem meios suficientes de subsistência tanto para a duração da estadia quanto para o retorno ao seu país de origem. Eles vão indicar um valor mínimo de 50 euros por dia. Isso e sua passagem de volta para casa.
Você também precisa fornecer as evidências exigidas para os parágrafos 1, 2 e 4 também.