Cashless society draws closer with only one in six payments now in cash

cash circulates widely between receiving it from the bank and going back to a bank anyway.

just went to my local farmers market today, all transactions were in cash. cash isn't dead.

I'd like you to imagine or ask any business whether they have ever had someone on the books whose only responsibility was managing cash serial numbers for reporting purposes.

The answer will most likely be no. There is no circular that goes around "here's a list of known bad dollar bills" like there are accounts/persona-non-grata via OFAC. This is also why the U.S. implements controls and reporting requirements on large cash withdrawals, because it can be a signal there is something odd going on they don't have enough controls in place to actually monitor.

There is nothing that would make the forensic accountant's life easier than cash disappearing and everyone switching to required by law digital bookkeeping. That database is only a subpoena away as long as uncooperative jurisdictional boundary crossing isn't in play.