The US system is linked to name + date of birth, the same as probably most
any other system.  They enter your name and DOB without regard to
nationality and the system pops up an image of your US passport on their
monitor, along with a full record of exits and enties ... been there, done
that many years ago before terrorism became a factor.

Regards/Roger, in Bangkok


On 9/6/07, Gerhard Fiedler <lists@connectionbrazil.com> wrote:
>
> Roger, in Bangkok wrote:
>
> > This "could" also pose a problem for you on returning to USA, if you
> exit
> > on your US passport but return on your Brazilian passport.  The US
> > system will showing you leaving but not having ever arrived anywhere ...
>
> How that? I don't think the US system is linked to Brazilian (or other)
> immigration services.
>
> Gerhard
>
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