Taking my minor niece to London - travel documents to show custody?
In July, I'm taking my 14 year old niece to London. Uncle Mike is just as excited as said niece. We're flying Delta, but I'm putting this in the TravelBuzz forum because my question isn't Delta specific.
What kind of documentation or paperwork does my sister need to prepare in order to allow my niece to leave the country with me? The further wrinkle is that my sister is divorced but has custody of Niece. Even if we need my niece's father to approve the trip, we can get that. I'm assuming that Her Majesty's government may have some concerns with a young woman traveling with an older man who isn't a her parent. We'd like to have those issues resolved/documented before we leave.
Niece has her passport, and will be flying as an unaccompanied minor from PIT (where she lives) to BOS (where I live) on B6. But then she'll be flying with me BOS-LHR and LHR-JFK-BOS on the return on DL.
Thanks for your input.