For information and advice on Greek customs regulations, visit the Customs website:

https://www.aade.gr/customs 

If you are not a citizen of a country that is a member of the European Union, you will need to obtain an International Driving License (IDL) before renting a car in Greece. If you plan to drive your own car, you need a valid registration and proof of international insurance in addition to the IDL (check with your insurance company beforehand).

There are 2 ways to rent a car in Greece. One of them is online, where you can reserve the right car before your trip. Another option is to contact a car rental provider that is located in the area you plan to visit.

To rent a car, a minimum driving experience of at least 1 year is required. The minimum age is 21 years (for some types of cars – 25 years).

The maximum age for renting a car in the country also varies, but most often they allow you to rent a car under the age of 70.

1. Adapt to the Greek time

Greeks tend to hold a healthy Mediterranean belief that most things can be put off until tomorrow and nothing needs to be done in a hurry - the Spanish "mañana" is equal to the Greek "avrio". So don't expect fast service in restaurants or smooth transportation. 

2. Entrance fees

All major ancient monuments, as well as most museums, charge an entrance fee ranging from €2 to €12, with an average cost of about €3. Entrance to all public monuments and museums is free on Sundays and holidays from November to March.

3. Outside of Athens, Greece is not very adapted for people with disabilities

Access for travelers with disabilities has improved somewhat in recent years, but most accessible attractions, hotels and restaurants tend to be located in Athens. While access to beaches has improved, much of the rest of Greece remains inaccessible to wheelchair users, and the abundance of stones, marble, slippery cobblestones and stepped alleys create unpleasant obstacles. People with visual and hearing impairments also rarely receive adequate services.

4. Carry cash and do not rely on cards or ATMs

As part of the EU, Greece uses the euro. In restaurants, service charges are usually included in the bill, and although tipping is not expected, it is always appreciated and a few coins can be left if the service was good. Taxi drivers usually expect you to round up the fare.

Keep in mind that ATMs on the islands can lose connection for a day or two, making it impossible for anyone (including locals) to withdraw money. It's a good idea to have some extra cash with you in case this happens during your visit.

5. Drink plenty of water and remember how dangerous the sun can be

On many islands in Greece, tap water is still safe to drink, but not recommended - ask if you are in doubt. Keep a supply of bottled water on hand for hydration as well as safety; many tourists underestimate how hot it can be in Greece, and heat strokes and serious sunburns are common on beaches with little shade. 

6. Pickpocketing and other petty crimes are common in public places

The main risks of theft in Greece are pickpockets in major cities and theft of belongings while vacationing on busy, popular beaches (leave your passports in hotel safes). Never leave your belongings unattended and do not leave bags hanging from the back of the seat where you cannot keep an eye on them. 

The Tourist Police work in cooperation with the regular Greek police. Each Tourist Police office has at least one English-speaking officer. If you need to report your passport stolen or lost, contact the Tourist Police first and they will be the translators between you and the regular police.

7. Emergency number for tourists

Of course, when you go on vacation abroad, you don't want to think that something will go wrong. And emergency numbers are something we don't usually use. As a foreigner traveling to Greece, it doesn't make sense to write down all the emergency numbers you might need. Therefore, keep a single number: 171 (the number of the local tourist police).

This is a special police unit trained to deal exclusively with helping tourists who encounter problems in Greece. They can help you with any problem: from finding a doctor to resolving disputes. And, of course, they can help you with anything related to local legislation. They are available 24/7 and although they mainly deal with Athens issues, you can call them from anywhere in the world.

And the most important thing is that they all speak English, but there is a high probability that they speak other languages as well. So save this number before you travel to Greece: 171.

Sources:

https://letterstobarbara.com

https://www.roughguides.com

Representations of Greece in the countries of the world.