You must ensure that all members of your travelling party are in possession of a valid passport. British passport holders must have at least 6 months left to run following the return travel date. All passengers must now have their own passport, including children and infants. Please see www.ukpa.gov.uk for more detailed information and how to apply. For non British passport holders, you should check with your own consulate.
If travelling from any EU member state, a photo Identification Card is adequate to travel with to Greece.

When arriving from certain countries, entry to Greece requires you to obtain a visa. This may need to be applied for in advance or upon entry to the country. You’ll need to check with the consulate of the country you are visiting whether you’ll require a visa and it will be dependent on your nationality.

Whenever you travel abroad, you should ensure that all members of your party are covered by adequate travel insurance.

At least six weeks prior to travel, you should check with your GP for advice on recommended vaccinations for your destination.
The Greek National Health system provides a basic medical service to Greek nationals and it has a reciprocal agreement with the British National Health Service. There are many public and private Hospitals and Medical Centres in Greece, all of varying standards. Doctors and facilities are generally good on the mainland, but may be limited on the islands.  The standards of nursing and after care, particularly in the public health sector lag behind what is normally acceptable in the UK.  The Public Ambulance Service, which will normally respond to any accident, is rudimentary.  There are severe shortages of ambulances on some islands.
If you are travelling from the UK, The E111 form is no longer valid.  You should obtain a European Health Insurance Card (EHIC) before leaving the UK. The EHIC is not a substitute for medical and travel insurance, but entitles you to emergency medical treatment on the same terms as Greek nationals.  It also does not cover you for medical repatriation, on-going medical treatment or treatment of a non-urgent nature. Therefore it is advised that you have sufficient travel insurance to cover health costs.

We recommend that you take photocopies of your passports and insurance policy and leave a copy, along with the 24 hour emergency insurance number and flight details, with a family member who is not travelling. Don’t forget your driving license if you wish to hire vehicles whilst on your travels.
We also suggest that you ask at reception whether your hotel has safety deposit boxes (there may be a local charge) to store your passport, travel documents and your copy of the hotel voucher, plus money and credit cards etc.

Generally there are no local travel restrictions, but you should be aware that certain areas near the Greek borders are militarily sensitive.  Although these areas can be visited without any problems, do not take photographs or make notes near military or official installations.  In addition, travelers should seek permission before photographing individuals.
Greek law requires you to wear a crash helmet on a scooter, moped or motorcycle. You may be arrested if you do not.  You should be aware that when hiring a vehicle, hire companies will often demand your passport as a form of security, as well as your driving license. You are advised not to hand over your passport under any circumstance. You should also check any waiver which will come into effect if the vehicle is damaged.   Quad bike riders require a full-face helmet (or non-full-face helmet plus goggles) under Greek law.  Road insurance and a motorcycle license are also mandatory.

Greek people are renowned for their hospitality.
The Greek police are used to dealing with large numbers of foreign tourists, especially on the islands and do so in a low-key way. Indecent behavior is not tolerated. The police have made it clear that they will not hesitate to arrest those who do it. You should be aware that the courts impose heavy fines or prison sentences on people who behave indecently. You should bear in mind that some fancy dress costumes may offend the local Greek authorities and be considered as contravening decency laws.

Getting prepaid phone cards is the cheapest way to make intercity or international calls. Local and international calls can made from public card phone using these prepaid calling cards or from kiosks (periptera) equipped with meters. Prepaid calling cards can be purchased from kiosks and OTE offices.

In Greece you can use all GSM mobile phones (system used in Europe and a few other countries) but US cell phones do not work in Greece. If you bring your own mobile phone with you, when you first switch it on in Greece, will be prompt of which mobile phone provider to use. We recommend you to choose the one recommended by your home mobile phone service provider (sometimes this will give you better rates). Certain companies provide a fixed charge per minute when "roaming" outside the country your phone service is from. Where this does not apply, you will pay fairly high rates for outgoing calls. Incoming calls are expensive, because you pay for the international part of the call (from your country, where your phone service is provided, to you, in Greece).

Electric Current- The standard in Greece is 220V AC (50Hz). If you are bringing your own equipment please remember to bring the Converters or Transformer you will need. Electric devices that are designed for use with 110V systems require Greek 220V current to be 'stepped-down’.

Greek time is two hours ahead of Greenwich Mean Time, an hour ahead of Central European Time and seven hours ahead of Eastern Standard Time.