Actually, no. There is no &quot;supposed to.&quot; You can register with the State Department if you live outside the US, just like you can register with the US if you travel outside the US. The web site is <a href="http:&#x2F;&#x2F;travel.state.gov&#x2F;content&#x2F;passports&#x2F;en&#x2F;go&#x2F;step.html" rel="nofollow">http:&#x2F;&#x2F;travel.state.gov&#x2F;content&#x2F;passports&#x2F;en&#x2F;go&#x2F;step.html</a> .<p>Do you really think that every one of the millions of American citizens who travel or live overseas each year is supposed to tell the US about their current location?