Well, it could only happen to this bank because its so corrupt.
After returning to Thailand after 22 years I had to re activate my Bangkok bank account which had 35K Balance, I was charged 9K for not updating the book and didn't get any interest since the new balance in the new book was only 26K. When I complained the woman said if I had any problems she would call security!
My other accounts had no problem updating the book balances without issuing a fine.
It could be associated to the fact that the Bangkok back account was opened in Pattaya but I later read that the Bangkok bank is the only bank in Thailand that requires you to update the book every month, how primitive in the day and age of technology,