I'd guess it has something to do with FATCA https://en.wikipedia.org/wiki/Foreign_Account_Tax_Compliance_Act https://en.wikipedia.org/wiki/Foreign_Account_Tax_

I'd guess it has something to do with FATCA https://en.wikipedia.org/wiki/Foreign_Account_Tax_Compliance_Act https://en.wikipedia.org/wiki/Foreign_Account_Tax_Compliance... > The Foreign Account Tax Compliance Act (FATCA) is a 2010 United States federal law requiring all non-U.S. foreign financial institutions (FFIs) to search their records for customers with indicia of a connection to the U.S., including indications in records of birth or prior residency in the U.S., or the like, and to report the assets and identities of such persons to the U.S. Department of the Treasury.[1]