Banks can and do get into hot water if they’re found to have handled – inadvertently or not – funds which ends up with banned entities, like DPRK or terrorist groups, or are the product of fraud AND that they ignored reasonable suspicions.

The classic example is the so-called “703 account” of fraudster Bernie Madoff, held at JP Morgan Chase bank. Although a humble checking account, it saw huge money inflows and outflows, with one reference showing a single withdrawal of $1.3 billion. For their wilful disregard of the obvious red flags, the bank was fined $461 million of their own money, separate from the seizure of the account to pay the victims.