Would I be able to leave the US with my Vietnamese passport (I have dual citizenship) and enter Romania with an invalid American passport (not because it’s expired but because it’s reported stolen but then I recover it) ?
No, once your US Passport has been reported stolen it is not only invalid but tracked by US immigration authorities.
NEVER TRY TO USE AN EXPIRED OR INVALID US PASSPORT
It is my impression that if you tried to get on a flight using this passport that you reported stolen, the authorities would be on you in a matter of moments, and then you will have to explain what you are doing with a stolen passport — even if it is your own! As soon as the airline swipes this passport, they will be notified that it is stolen. I highly recommend that you do not try it!
From the official US Immigration website travel.state.gov
The information you provide regarding your lost or stolen US passport or passport card will be placed into our Consular Lost or Stolen Passport System. This system is designed to prevent the misuse of your lost or stolen US passport . . . Anyone using the passport book . . . reported as lost or stolen may be detained upon entry into the United States. Should you locate the US passport book reported lost or stolen at a later time, report it as found and submit it for cancellation. It has been invalidated. You may not use that passport for travel.
In point, do not try to travel with an invalid passport.
One thing that you can do to try to save your trip is to immediately travel to the Romanian consulate nearest you and try to get an expedited visa with your Vietnamese passport. Explain that your current US passport is at the British consulate (what kind of UK visa are you applying for anyway?) and that you have not yet had it returned to you. Show proof of travel (photocopies of your plane ticket) as well as a photocopy of your current, valid US passport — if you have one.
I would also HIGHLY recommend sending in your invalid US passport to the national passport processing center, so that it can be officially canceled. Having it on you is grounds for penalty.
I hope this helps.
Original question about potentially using an invalid US passport
Here’s my situation:
i need to leave US on the 7th to Romania. I don’t have my valid American passport because I needed to send it to apply for a british visa and I still haven’t gotten it back yet.
But now my question is would I be able to leave the US with my Vietnamese passport (I have dual citizenship) and enter Romania with an invalid American passport (not because it’s expired but because it’s reported stolen but then I recover it) ?
On my vietnamese passport it has a stamp from the US , admitted on aug 20 2007.
Should I travel with both passports ?