Banking reference letter (for immigration) for your visa extension. It just confirms your the account holder, your account number, your balance, that type of thing, most banks are aware of the form. You should also need a 12 month statement.
so its normal for the next ext. However, its normally 4 months not 6, but it coulld be a miscommunication, or local policy. Call me if you want to discuss further. Welcome to the real Thailand 🇹ðŸ‡
this is unusual but thats not new, if its not related to your 12 month ext there is no reason to freeze, because its your money. How the local branch may have its own rules regarding opening a new account. Why not pop in and clarify it with them they are a friendly bunch, somehow I think it maybe locking it for your next ext.
Paul, did you just complete your 12 month visa ext for a spouse? (Marriage ext). If so did you obtain a bank balance certificate at this branch that confirms the amount of money you have in the bank? If so its a Bangkok bank policy to freeze your account for 4 months normally before issuing the certificate. Maybe the 6 months is because its a new bank account or miscommunication.