"I want to ask about the bank letter for a 1-year extension. My Bangkok Bank account is from another province, which is about 6 hours away from where I currently live. So I want to get the letter from a nearby branch. Can I get the letter from any branch, or do I have to get it from the branch where I opened the account? If I get it from my original branch, it will take me another 6 hours to return. I’ve heard that the bank letter can only be used on the same day — is that true? Can someone advise me, thank you."