A wrinkle I just encountered is that some electronic passport readers appear to be linked to departure records. I was travelling from New Zealand to the UK, and have ePassports for both (case 1 of the accepted answer). I showed my UK passport to the airline agent checking me in, and then attempted to use my NZ passport in the passport reader at the immigration control point. It did not work, and I had to use my UK passport instead.
Most commonly this is an issue when travelling between the countries of your nationality, which has been well-answered by other people. Otherwise, it may be an issue if you have visa-free travel to a particular third country under one nationality and not the other – in which case, obviously, use the passport that you don’t need a visa in.
There is the case where you’re travelling to a country that one of your nationalities doesn’t get on with, in which case you can travel on your other passport. The obvious examples here are North Korea on a South Korean passport and parts of the Arab world on an Israeli passport. I would strongly suggest not using a second nationality in cases where you’re facing that level of hostility; if you’re exposed then you could be in real physical danger or danger of arrest.
But there’s another case where having multiple nationalities is useful.
On most Western passports, you can travel to Israel; you can also travel to most of the Arab world. But if you try entering certain Arab countries with an Israeli stamp in your passport, then you’ll be refused entry.
If you have two passports, you can have stamps for Israel (and Jordan and Egypt if you enter across the land border from Israel) in one passport and those for the (rest of the) Arab world on the other. While some countries will issue you with two passports, it’s a lot easier to keep them apart if you have two different nationalities (you’re a lot less likely to pick up the wrong one by mistake).
The anser to your question can depend on the countries involved. For example, a US State Department website says this about dual citizenship Israeli-Americans:
“Israeli citizens naturalized in the United States retain their Israeli citizenship, and children born in the United States to Israeli parents usually acquire both U.S. and Israeli nationality at birth. Israeli citizens, including dual nationals, must enter and depart Israel on their Israeli passports.”
Source: travel.state.gov
I have the same situation and have traveled extensively. There where a few reasons why to use two passports on one trip:
Usually I would try to use only one passport during a trip, if you must use two it’s usually not a problem, you can just show both at check in (if needed) and at immigration (if asked).
I was pulled aside one time in Hong Kong, mostly since my first name is spelled differently in both passports, after a short explanation I was sent on my way.
It’s only problematic if you hold a passport to a country that is refused entry (e.g. going to Malaysia with an Israeli passport) and try to enter with your other passport. I would highly advice against this.
Safe travels!
This is a common situation, and it’s generally no problem. I’ll use A for the country you’re in, and B for the country you’re going to, but all the “flows” described here work equally well if you want to use your B passport to go to a third country.
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If you have the same name in both passports (that is, same first name and last name, minor variations are OK), and both countries accept dual citizenship (if you’re not sure, find out here), the basic formula is:
In step-by-step detail, when flying from A to B and back:
And on the way back from B to A, just reverse the process:
Pictorial representation for a UK/US dual citizen visiting the US, courtesy @GayotFow:
If your names are different, but your countries are OK with each other:
Things get harder if one or both your countries does not accept dual citizenship, especially if they care enough to look for visas or arrival stamps. The key thing to understand here is that the airline is not a part of immigration. They do not care if you have multiple passports and they are not going to tell immigration if you do, all they want to know if whether you will be allowed in at your destination.
So here’s one way to avoid letting A know you are also a citizen of B (but B will know you’ve come from A):
On the way back, though, you will need a short detour:
Beware that this is not totally foolproof, as a very careful inspection of your stamps will reveal that you were not in C for the whole time, but unless you’re North Korean, it’s unlikely you will be subjected to this level of scrutiny. Some people choose to go through immigration in C on the way out as well, so they get more decoy stamps. Doing that is necessary if you also want country B not to know that you’ve come from A (making the scenario symmetric).
If you have different names and your countries don’t like each other, you can still use the same method as above, but you’ll likely need to book your A-C-A flight in your “A” name and your C-B-C flight in your “B” name.
Credit:stackoverflow.com‘
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