Any international bank that wants regular access to US dollars needs to play nice with the US Treasury. This means if you're a US Bank account holder and live a

Any international bank that wants regular access to US dollars needs to play nice with the US Treasury. This means if you're a US Bank account holder and live abroad, they want to know. Similarly if you're a US citizen with a foreign bank account, they want to know. Not as onerous as transferring a bank account to another entity, but the oversight is pretty extensive nonetheless.