If a child (under the age of 18) is traveling with only one parent or with someone who is not a parent or legal guardian, U.S. Customs and Border Protection (CBP) strongly recommends that the accompanying adult have a note from the non-traveling parent (or, in the case of a child traveling with neither parent, a note signed by both parents) stating “I acknowledge that my wife/husband/etc. is traveling out of the country with my son/daughter/group. He/She/They has/have my/our permission to do so.”
Sample Document for One Parent Traveling Internationally with Children.
Today’s Date
To Whom It May Concern:
My daughter/ son, (child’s name), has my permission to travel with his father/mother, (traveling parent legal name as is appears on passport), to (country) without me. He will be traveling from (dates range) to (city/county ex: Cozumel Mexico) for a diving vacation. (Child’s name) has my permission to participate in all diving related activities.
In addition, (child’s name) may receive any medical treatment that his mother/father deems necessary. Thank you for you consideration.
__________________________________ __________________
Name, mother/father of (child’s name) date
_____________________________________________________
Signature
Notary:
____________________________________