Travel Documents

A travel document is an identity document issued by a government or international treaty organization to facilitate the movement of individuals or small groups of persons across international boundaries. 

Passport

A passport is a travel document that also serves as proof of citizenship from the issuing country. Although generally accepted by the majority of countries in the world, some issuing countries expressly exclude the validity of passports from nations that are not recognize dby their governments. The elements of identity are name, date of birth, sex, and place of birth. Most often, nationality and citizenship are congruent.

Visa

A visa  is a document showing that a person is authorized to enter the territory for which it was issued, subject to permission of an immigration official at the time of actual entry. The authorization may be a document, but more commonly it is a stamp endorsed in the applicant's passport. Some countries do not require a visa in some situations, such as a result of reciprocal treaty arrangements. A visa does not generally give a non-citizen any rights, including a right to enter a country or to remain there. The possession of a visa is not in itself a guarantee of entry into the country that issued it, and a visa can be revoked at any time. The visa process merely enables the host country to verify the identity of the visa applicant before the entry of the applicant.

Health Inssurance

This document important if you are suddenly taken ill or have an accident during a temporary travelling. Each country has its own rules for public medical provision. In some, treatment is free, in some you pay part of the cost, in others you have to pay the full cost and then claim a refund. So keep all your bills, prescriptions and receipts. Apply for reimbursement in the country you are visiting or, failing that, when you get home.