QUOTE(michellek1976 @ Jun 27 2006, 05:44 PM)

Thanks guys for the input. I better get onto that soon. Lucky I asked the question - never seen it written anywhere on USCIS forms.
Because it's not a USCIS requirement. It's a Customs enforcement issue, from the Department of State. The Embassy will ask for the appropriate documentation for the visa issuance. The USCIS process is only a petition to request permission from the government to initiate the immigrant process.
The International Child Abduction treaties, have a requirement that any child coming across the border of any country that is a party to the Hague Abduction Convention, must have the permission of both parents to make the border crossing. If you are married, and you spouse is with you and your accompanying children have your same name, you will be waved right on through. If the children with you have a different name, then you have to have notarized copies of the documents that prove you have a legal right to the children and that they have permission to cross the border. This would be a divorce decree, with appropriate custody arrangements and a notarized statement from the other parent that the children have permission to cross the border.
It's ugly, its messy, it's required.