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.

Minors (typically defined as those under 18) traveling internationally without both parents require a comprehensive set of documents to clear immigration and airline security. At a minimum, they need a valid passport and any necessary visas for their destination. Most importantly, they should carry a Notarized Consent to Travel letter signed by both parents (or the non-traveling parent), which explicitly states the child has permission to travel, the travel dates, and the contact information for the guardians. Many airlines also require a specific "Unaccompanied Minor" (UM) form if the child is between ages 5 and 14 (or up to 17 if requested). This service involves a fee and ensures the child is escorted by airline staff from check-in to the meeting party at the destination. You must provide the name, address, and ID of the person picking up the child, as they will be required to show identification before the minor is released. It is also wise to check the specific entry requirements of the destination country, as some nations like South Africa or Brazil have extremely strict laws regarding the documentation of minors.