@Jack *******
that is totally NOT the norm for yearly extensions of stays based on bank money method 😮
Most all immigration offices require the bank print the 3 month yearly transaction report for the first year extension (when you need the banked money seasoned 2 months before you apply)
AND
Then they require a year detail transaction report printed for subsequent yearly extensions based on banked money because that's the only way to check you kept the 800K baht in the account for 3 months after the extension was issued and then never let the balance go below 400k baht the rest of the year
Unless you have an account you just "Park" the 800K baht in most offices ALL require that detail transaction report