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They shouldn't. There are lots of people with dual citizenship and lots of parts of the world that require citizens to use their local passport for entry.
Which can be a problem if you live in country A and want to visit B where you are a citizen but haven't been for decades and so don't have a current passport.
jellybaby-
Which can be a problem if you live in country A and want to visit B where you are a citizen but haven't been for decades and so don't have a current passport.
It took me ages to find my British passport earlier this year when I thought I may have to go to the UK in an emergency (didn't need to in the end). I'd just lobbed it in a box about 8 years ago and forgotten it as I've never needed it as I travel on my other one. Prior to that I used to travel with both and never had trouble at immigration even if they could see both. Nobody out to illegally enter a country shows two passports to immigration unless they're idiots.
atz
Customs seem to get a bit funny went entering the EU on an EU passport and then coming back on a UK passport.
Customs get interesting when they see two passports.