[Eduard]

Like 0 cash registers I have ever seen employ this.

[anonporridge]

Truth is, most cash these days probably only has one or two transactions between bank withdrawal and bank deposit.

If the banks track serial numbers, they could probably build a fairly complete picture of what kind of transactions are going on. With the vast amount of data, you could probably fill in a lot of the gaps.

[deftnerd]

It's a feature on some money counters, which seem like something banks might use at the end of the day to check the balances in the drawers.