My daughter was born in England and came to America 32 years ago. She is an American citizen. Two years ago she moved to the UK with a British passport. She now wants to return to the US but doesn't have a US passport. She has never had a US passport.
As a US citizen, can she return using her British passport only?
There are two conflicting laws
The going legal opinion seems to be that #2 will trump #1, so if your daughter shows up at the border with sufficient proof of citizenship, chances are she will eventually be admitted. See for example https://law.stackexchange.com/questions/16654/can-us-citizens-be-denied-entry-to-the-us
However, getting to the border itself will be difficult. No airline will allow her to board with an expired US passport.
The solution is easy enough: she should get a US passport. If you are in a hurry, do this: https://uk.usembassy.gov/u-s-citizen-services/u-s-passports/emergency-passports/
No, it is illegal for US citizens to enter or leave the US on other than a US passport. Leaving and entering the US with a foreign passport
