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Well, you just need to make sure that the person taking your child is in possession of Travel Consent Document. Here is the sample:
To whom It may concern
Travel Consent
1. I, __________
(parent name) make oath and say that I
am the lawful Father of __________________ (child name) (Female) born on _________ in ____________, passport, number ____________, issued on _______________ in _____________; .
2. ________________ (name of child) (my child) has my
consent to travel with ______________________ person bringing to the US (relation); passport # ______________, issued on _________________in _______________.
3. This consent is valid for travel starting on or about ___________________ and returning on or about _____________________ from and is not
limited to a specific location.
4. For further information I can be reached at:
Name of Parent
Phone
Signed this 23rd of August 2010
_________________
Signature
Subscribed and sworn to before me on ________________ at New York.
________________
Notary Public