To make a reservation, you must indicate the number of the document of the trekker. This mandatory number should be:

Country of residence Nationality Explanations Document number to give
Outside Peru Any nationality Profile of most travelers. None other document than the passport is accepted. Passport
Outside Peru Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Paraguay, Uruguay For countries having signed a free circulation frontier agreement with Peru. National Identity Document or passport
Any country Peru For Peruvians, residents in Peru or not. DNI
Peru Any nationality For residents in Peru. CE (Alien's ID)
You can only make a reservation if the document is valid. You cannot make a reservation if the document is not valid, is temporary, is or will be expired at the date of the Trek. If your document is being made or renewed, you must wait and book when you have the final document.