[CaptainZapp]

You're erroneously assuming that banks can detect all possible suspicious activity on their own

You're right, that's probably not possible to begin with.

However, if a bank spots patterns, which don't smell quite right they are obliged by law to report it to regulators.

Another reason why Deutsche is yet again in so much hot water[1]. Essentially they refused to report suspicious activities, which was flagged by a compliance officer.

[1] https://www.vanityfair.com/news/2019/06/donald-trump-deutsch...