If the minor is traveling with both parents
Each traveler must carry a valid document. Also bring a birth certificate, family record book or another official document proving parentage, especially if the surnames are different.
RIO GUIDE
Authorization is usually checked when leaving the country of origin. Brazil does not require a special authorization solely for a foreign minor to enter as a tourist, but the departure country, the minor's nationality and residence, and the person accompanying them may require one.

Each traveler must carry a valid document. Also bring a birth certificate, family record book or another official document proving parentage, especially if the surnames are different.
As a general rule, authorization from the parent who is not traveling must be presented, signed before a notary, migration authority or consulate according to the rules of the country of departure. The minor's document, the accompanying adult's document and proof of parentage are also presented.
Authorization from both parents or legal guardians is normally required. It should identify the minor, the people granting permission, the companion if any, the destination and the authorized period. The airline may also require its own service and form for unaccompanied minors.
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A Chilean minor or foreign minor residing in Chile who travels with only one parent needs notarized authorization from the parent who is not traveling. Chile recommends carrying the original and three simple photocopies, along with a valid ID and birth certificate or family record book. If traveling without either parent, authorization from both is required.
If the minor travels with only one parent, they must carry permission from the absent parent, valid documents and proof of relationship. If traveling alone or with a third party, the corresponding authorization from parents or guardians is required, granted before an authority accepted by immigration.
Carry a death certificate, document proving sole parenthood, custody ruling, guardianship or court decision, as applicable. These documents replace or determine who must authorize the trip; a verbal explanation at the border is not enough.
Do not forge or replace the authorization with an informal declaration. Authorization must be requested from the court or competent authority in the country where the minor lives or departs from. Do this well in advance.
Full names, document numbers, details of the minor and accompanying adult, destination, dates or validity period, and explicit authorization to leave the country. Depending on where it is issued, certification, legalization, apostille, translation or an official form may be required.
Valid documents for the minor and accompanying adults; original travel authorization and copies; birth certificate or equivalent record; court or death documents when applicable; tickets; accommodation; insurance; medication and emergency contacts.
Confirm the requirement with the immigration authority of the departure country, the relevant consulate and the airline. A stopover in a third country may add different rules. Authorization to leave one country does not replace a visa, document or permit required by another.

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