but if a customer comes in with a US passport the banks already know they will have extra work to do and additional disclosure. Thais without US tax obligations just state that and no more work required for the banks. I was pointing out that in this specific case the banks might have been reluctant to open an account is because it was clear from the start they would have additional FATCA compliance due to US passport - and not because of “general” difficulty for non-Thais to open a bank account
Although opening a bank account for non-Thais might have become more difficult I guess in this case the main problem is the US nationality or residency - as this creates a FATCA problem. Banks all around the world are hesitant to open bank accounts for US citizens as it creates huge compliance and reporting costs.