I used to work as a teller at a bank, and people would be really mystified when I wouldn't id them for deposit transactions. The rules might have changed now, b

I used to work as a teller at a bank, and people would be really mystified when I wouldn't id them for deposit transactions. The rules might have changed now, but at the time anyone could put a deposit into any account they knew the number for. That's how after hours business deposit boxes work, after all. Some people would be genuinely upset, until I pointed out that the transaction receipt only showed that a deposit had been made, and that I wasn't revealing anything that the depositor didn't already know. There was no known threat vector that we could figure.