What type of visa does a bank require to activate an account in Thailand?

Users report experiencing issues with bank account freezes in Thailand, most commonly linked to visa requirements. Long-term visas such as those for marriage, retirement, or volunteering are often necessary to keep accounts active. Specific banks, like Bangkok Bank, may request an Account Verification Letter, which can prevent freezing if properly addressed. Overall, it seems that having a valid long-term residency visa is a key factor in maintaining an active bank account.