A travel document number is a unique identification number assigned to a travel document, such as a passport, visa, Green Card, or any other federal ID. It is a set of digits that helps authorities recognize each individual traveling and is used to track and verify the identity of travelers crossing international borders. The travel document number is printed on the travel document as a code associated with the persons identity. It is used to ensure the document is valid and not fake, and to identify you as a traveler, ensuring you’re eligible to travel abroad. The travel document number is so important because it is the way of being identified by authorities when you travel, and it is the main way all security agents across borders and foreign lands validate your travel document.

Every passport has a travel document number, which is a 9-digit number located in the top right-hand corner of the passport. No two passports have the same number. The travel document number is also located on the most important page of any passport, the personal information or data page, the one with your photo. The travel document number is usually located on the right.

It is important to note that a passport number is also a travel document number. However, each travel document has a specific number, so it is essential to know the different travel documents. For example, if you have a passport card and a passport booklet, the two numbers will be different as each number is unique to the document.