Brazil Minor Requirements Both parents must fill out and sign an “AUTHORIZATION FOR ISSUANCE OF BRAZILIAN VISA FOR MINOR” form. Applicants under 18 years old do not sign their visa application forms, as they are considered minors. Birth Certificate: Original or notarized certified copy of the birth certificate.
Unless there is a legal order that states a parent cannot leave the US or otherwise travel without consent, then it's not required. Taking a child on a trip or vacation is never kidnapping in the absence of a court order that states otherwise.
Children must usually have the same passport, visa or other international entry documentation required of adults. In addition, certain countries require children leaving that country without both parents or a legal guardian to have a letter of consent, in some cases notarized.
British-Brazilian dual nationals under the age of 18 who are travelling without both parents or legal guardians need authorisation from both parents or legal guardians to travel in Brazil or leave the country.
Submit a Statement of Consent: Form DS-3053 or a notarized statement from both parents or guardians giving that person (example: grandparent) permission to apply for the child. Include a photocopy of the photo IDs for both parents or guardians.
The letter of consent, preferably in English and notarized, from the other parent (if the child is traveling with one custodial parent) or signed by both parents (if the child is traveling with a guardian or alone) should say: "I acknowledge that my child is traveling outside the country with the name of the adult ...
Legally or developmentally? Legally, it depends on your jurisdiction, however, by and large, children need the permission/approval of both parents to leave the general area of their home... To travel internationally, they need a passport and the consent of both parents, unless one parent has sole legal custody.
Brazil Entry Requirements Children under age 18 traveling alone, with one parent, or with a third party must have a notarized, written authorization from the absent parent or legal guardian. It must be translated into Portuguese and authenticated by a Brazilian embassy or consulate.
Non-U.S. citizen children traveling to the U.S. A letter of consent, preferably in English and notarized, from the other parent or signed by both custodial parents. The letter should say: "I acknowledge that my child is traveling outside the country with the name of the adult with my permission."