Assuming an Australian who was a former resident of Thailand. He moved to Vietnam and kept his Thai bank account. However, this Australian has no more contact point/phone number/address in Thailand. He gives his︀ Thai bank a complete data set of his Vietnamese residence (address, phone, documents ...). He︁ is now a non-resident for tax purposess in Thailand. Vietnam is non-CRS. He uses his︂ Thai bank account for purchases through his debit card mostly within Thailand and Vietnam.
What will the Thai bank do?
I understand that the above is a non-reportable account. However,︃ this being Thailand I am wondering if the bank would send the clients' account data︄ to The Revenue Department just because he/she is non-tax resident?