I am not sure it will be useful for people under DTV.
As for me they took the letter from university saying that I'm at University. The payment receipt I did to the University. My condo contract, my student card, my Thai drivers license, proof of payment for condo rent and my Thai phone.
Student at University, but my BKK bank account did the same today. No notification.
I went to the bank.
They freeze it.
They ask me some papers, sent it to the main Branch and they will call me in a week to let me know if I can keep it and unfreeze or if I've to close it.