In case of trips national, and even though international, the document of Identity must be led. If it intends to rent an car, in Brazil or in the exterior, you it will have to possess qualification wallet. Therefore it is always good for having it in hands.   It does not forget to verify with its agent of trips if the data of the aerial ticket, to voucher of hotel/car, are correct. He is intent to the dates and schedules of flights.   Alone minor travelling ALWAYS needs an authorization of the parents, wants goes for the exterior, wants travels for the country. The authorization must be made in a Juvenile court. Which is inquired is next to its residence or work.    Countries of the Mercosul   Brazil has accord with Argentina, Uruguay, Paraguay and Chile, therefore they will be able to travel for these countries being only presented identity card in good condition of conservation (also the minor ones).   The Argentines, Uruguayans, Paraguayans and Chileans who travel for its respective countries will be able to more travel with identity card for foreigner and the identity card of its native country.