A passport is a specific type of official identity document used for international travel. A country's government issues the document to its citizens or in some cases, to noncitizen nationals.

Travel document number is a set of digits that is found on your official travel documents needed for government records and to help the necessary authorities identify each individual who is traveling.

What is a travel document number? Before you plan on traveling to any country, you need to have travel documents. These are what determine your eligibility to travel and enter a country.