Some are "accidental Americans" like UK Prime Minister Boris Johnson, born in the US, who discovered as a US citizen he had to pay capital gains taxes when he sold his London apartment. Australia requires its parliamentarians to have only Australian citizenship and some discovered for the same reason they were not eligible.
Furthermore, the burden of FATCA is sufficiently onerous that many banks etc. just refuse to deal with it and close the accounts of US persons. A number of long-time expat Americans, e.g. in Germany, have renounced their citizenship because they are unable to function due to this.
Furthermore, the burden of FATCA is sufficiently onerous that many banks etc. just refuse to deal with it and close the accounts of US persons. A number of long-time expat Americans, e.g. in Germany, have renounced their citizenship because they are unable to function due to this.