You need to take a notarized letter, signed by you and your husband stating that you will be travelling with your daughter, [DD full name], who holds passports from these countries [country name], numbered [XXXX] and [XXXX].
Here is the template we used:
When I traveled alone with DD I was never asked for a letter like this, but I did wonder if it would be an issue. My guess is that the border control people didn't even think to ask because we have the same last name, were both traveling on US passports, and look to be the same ethnicity. If I were you, I would definitely take a letter like the one linked just in case. It's annoying, but it's for your child's protection to help prevent international kidnapping.
We just got back from the US last month...and I was asked for the letter departing the UK, arriving in the US, leaving the US and arriving back...I was so glad we had it and got it notarized. US passport control said they require it, but i guess it depends which employee you get as to whether they ask for it.
Thank you for your advice! How do you "notarize" a letter? Sorry if it is obvious, this is a little confusing and new for me... Did you have to take four copies of the letter for each time you went through customs (did they keep the letter), or was one original enough for the entire time? Thanks again....
We had two copies notarized. One for me to travel with and one for DH to keep - in case he was contacted or I went crazy and didn't come back (LOL, but it happens?).
We had to take our letters to a notary public, which is a person who has been authorized to sign things like our letters. They have an official seal that gets stamped on the paperwork.
I guess it would probably be good enough to get someone professional (that you know?) like an accountant, teacher or police officer to 'witness' the documents, but I am sure you can call the US Embassy where you are and find out?