According to U.S. Customs and Border Protection (CBP), if a child is traveling abroad (including Canada) with one parent, the other parent must supply a letter granting permission. If the child is traveling with an adult other than her parents (school trip, tours, sports, etc.), both parents must provide written per mission. See U.S CBP article 1375 . The agency strongly recommends that the permission form be notarized. While the U.S. customs officials do not always ask for t
