No matter where you come from, usually the most important ID document abroad is the International Passport. In order not to get into any unexpected situation, it is essential to check that your passport is still valid and its expiration date has not passed. If you have travelled a lot and there are no free pages left for another Visa, it is also necessary to inquire if you need to apply for a new passport before your holiday.
Even if you are an EU citizen going to another EU country, you should check if the rote for your trip does not pass trough non-EU member countries, as you will not be allowed to enter the country without a valid international passport.
Power of Attorneys
If there are children in the group and both parents are not travelling, it might be necessary to present a Power of Attorney or any other kind of document depending on your local legislation, which certifies that both parents agree that their child travells abroad.
If you are travelling by car with a leased or rented car, it is absolutely necessary to present to the customs authorities a document, stating that the car is owned by a bank ( or a leasing company ) or by the car rental company, and you are authorised to use the car and to cross borders.
Travel Insurance Policy
Although it is not a required document when you are travelling alone and at your own risk, the travel insurance policy is a must for every traveller. If you are on a holiday with an organized group, your travel agent might include the international travel policy in the holiday package. However, you need to check this, and in case such is not included, you can book one very easily.
If you are travelling alone, especially in countries and places you aren ot familiar with, it is highly recommended that you have a valid travel insurance policy with you, covering all possible travel risks from medical expenses to luggage loss. This can save you a lot of money if such situations occur, and will guarantee you the necessary peace of mind, so you can go on and fully enjoy your holiday.
Always check if you have your flight ticket with you when you leave home or the hotel you have stayed in. If you are using an on-line check-in option before departure, you have to make sure that you have checked-in within the exact time for it and to print your ticket, as if you have not made it and you have to get a ticket on the airport, there will be an additional charge.