When collecting your non immigrant o marriage visa, do you need a letter from the bank reconfirming the amount in your account? Or will an updated passbook do the trick? Thanks

Hi all, I have some question on Non-O visa extension via marry to thai wife.

My extension would be in Nonthaburi Immigration office.

This is my 1st time application for convert to 1 year. I get multi entry non-o visa and did visa run in the past.

I have 400k session in Bank and plan get bank letter for the process.

1. I saw some post it is up to 3 day. Does it mean bank letter only good for 3 day?

1. Lets say my fund reach 400k on 1st June, can I request bank letter on 1st Aug?

1. Is affidavit require for 1st time extension? if yes, where can I get one?

Thank you for your time