No, it is not legal for one parent to leave the US with a minor child without the consent of the other parent. This is a form of parental kidnapping, which is a criminal offense in the US. The parent who left the US with the child could be prosecuted for this crime, and the child could be returned to the other parent.
The letter should include the other person's contact details and details about the trip. It also helps if you've: evidence of your relationship with the child, eg a birth or adoption certificate. a divorce or marriage certificate, if you are a single parent but your family name is different from the child's.
If you're planning on traveling with your own offspring, presenting their passport or birth certificate might suffice; however, if you're accompanying a minor who isn't your biological or adopted child then this notarized document becomes essential.
I, ______________________________________________ (name of parent), am the ______ (mother) ______ (father) of __________________________________ , aged ____________ , and do hereby give my consent for (him)(her) to travel with __________________________________________________________________ (name/address of traveling ...
How do I fill this out? Collect the child's information, including full name and date of birth. Gather details about the accompanying adult, such as their name and relationship to the child. Outline the trip information, including destination and travel dates. Include the signature of the consenting parent or guardian.