I watched A Simple Plan (1998) at the weekend and SPOILER ALERT: a large percentage of the bill's serials were recorded.
I just don't understand in practice how this is an issue.
Say you spend $100 on groceries with marked cash, how are you de-anonymised? The cash mixes in with all the rest of the cash from other registers and then gets picked up by Securicor and so on.
If you just spent a few bucks on groceries once, then you are in the clear. But if you get doing it repeatedly, or worse, spent a whole bunch of cash to buy a car or something expensive, then when that money did get back to a bank then eventually those numbers will be identified and FBI will be notified. If you are trying to spend $20 or $100 in marked bills, you'd be fine. But try that with 4 million in $100 bills, it won't take long for them to find you. Not instantly, but eventually.
I just don't understand in practice how this is an issue.
Say you spend $100 on groceries with marked cash, how are you de-anonymised? The cash mixes in with all the rest of the cash from other registers and then gets picked up by Securicor and so on.
Never made sense to me!