<Li> Residency: a country may tax the income of anyone who lives there, regardless of citizenship or whether the income was earned in that country or abroad (most common system); </Li> <Li> Source: a country may tax any income generated there, regardless of whether the earner is a citizen, resident, or non-resident; or </Li> <Li> Citizenship: a country may tax the worldwide income of its citizens, regardless of whether they reside in that country or whether the income was sourced there (as of 2012: only the United States and Eritrea). A few other countries tax based on citizenship in limited situations: Finland, France, Hungary, Italy, and Spain . </Li> <P> U.S. persons living outside of the United States are still subject to tax on all of their worldwide income, although US law provides measures to reduce or eliminate double taxation issues for some . It has been reported that some US citizens have relinquished US citizenship in order to avoid possible taxes, the expense and complexity of compliance, or because they have been deemed unacceptable to financial institutions in the wake of FATCA . </P>

What countries can you have dual citizenship with the usa