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by joering2 5157 days ago
I would imagine by now there are some treaties between most nations that exchange such information. There is also passporting system. You gave them any sort of passport (at least here in US) and they will look it up in the computer. They have to be looking up some sort of database, right?)

I could imagine someone holding so many citizenships would be very valuable asset to government agency that hire spies.
1 comments
refurb 5157 days ago
Indeed there are! This one is just for signals intelligence, but you can be sure that they share a lot more than that.

http://en.wikipedia.org/wiki/UKUSA_Agreement

"The United Kingdom – United States of America Agreement (UKUSA, /juːkuːˈsɑː/ ew-koo-sah)[1][2] is a multilateral agreement for cooperation in signals intelligence among the United Kingdom, the United States, Canada, Australia, and New Zealand."

link