What is the penalty for U.S. citizens entering leaving the US on a foreign passport?
There are no penalties. The customs officials might be furious but the only thing they can do is confirm you're citizen and let you back in. As for leaving the US, the US doesn't have exit checkpoints so you can leave on any passport.
People Also Ask
Can I have a second U.S. Passport? A little-known fact is that Americans are eligible to hold two U.S. passports at the same time, which can be particularly helpful for travelers who frequently travel to places that require visas. As I work on trying to visit every country, I have to apply for a lot of visas.
Singapore has taken first place on the latest Henley Passport Index 2023 rankings. Singaporeans enjoy visa-free access to 192 travel destinations out of 227 worldwide. With Japan falling to third place, three European countries tie in second place: Germany, Italy and Spain with visa-free access to 190 destinations.