A word of warning regarding the certification of required funds being issued by Bangkok Bank for visa purposes:

Today, 22JAN2026, I went to their Hang Dong office (Chiang Mai) to get certification that I've had 400k THB in my account for 2 months (per immigration requirements for a 1-year extension based on marriage). I've been through this process with BKK Bank the previous two times I extended my visa based on marriage, so it's not new to me.

After a longer than normal wait the bank rep returned and said that Bangkok Bank now requires that the funds are in an account with them for at least 4 months prior to issuing a certification. (This must be a relatively new rule for them implemented within the last year, because this definitely wasn't the case as of 14FEB2025.)

The alternative is they can offer a certificate that funds have been in the account for 2 months, but the money in the account then must remain untouched for 4 four months after the certification is issued.

Luckily, I went in earlier than normal to extend my visa this year. I also deposited the 400k THB in Oct 2025. The money will have been in my BKK Bank account for 4 months by early Feb (still enough time to apply before my current stamp expires). Aside from wasted time, it won’t affect me.

I’m not sure if this is a policy being implemented by other banks in Thailand, but it definitely caught me by surprise. Thought it might be helpful to others that may not know the new rule with Bangkok Bank.