Originally Posted by
WarrenUK
I travel ALOT. I also travel to lots of not always "mutually friendly" countries. To make life easier I have a number of passports from different countries (don't ask).
As you are from Belfast, I can guess at least two.
Originally Posted by
WarrenUK
Anyway, here is my question. For the US, if I travel inbound on one passport and then was to "accidentally" leave on a different passport, would that set me up for a problem on my next trip through the world of US immigration? I do keep a "clean" passport for US transits and am pretty religious about using it but I do worry that some day I will be at passport control and will hand over the wrong one.
If you are a US citizen, you of course are required to enter on your US passport. If you are not a US citizen, you get a little green slip of paper stapled into your passport upon entry, which needs to be surrendered to the airline agents upon departure from the US (there are no exit checks upon departure of the US). If you do not do this, then you will face major problems upon re-entry.
Bear in mind that there is no "leaving" the US on any passport, as there are no exit checks (this is uncommon as most countries have some form of exit check).