I admit this is a bit of tin hattery. But that said at my bank the cash is distributed from machines that the teller uses. You go up, make a withdrawal, they ty

I admit this is a bit of tin hattery. But that said at my bank the cash is distributed from machines that the teller uses. You go up, make a withdrawal, they type the amount into the machine and bills are counted out. I am sure this offers several advantages to the bank. That said, however, maybe I can see it being straightforward for these machines, along with ATMs, to log bill serial numbers as they’re distributed. I have no idea if this is being done, simply, at least at my bank there’s an avenue for it to happen. I would also freely admit that it would be an imperfect system. But still food for thought.