There are red flags at banks. Offshore style banks like HSBC are more susceptible to this kind of stuff because they have less of a wider stake in the situatio

There are red flags at banks. Offshore style banks like HSBC are more susceptible to this kind of stuff because they have less of a wider stake in the situation. Also, with 'cross jurisdictional' stuff, then it gets easier to hider. Another way of helping would be saying 'your business transactions in the US has to be transacted by a financial entity hosted in a regime with strong regulations and transparency with the US' kind of thing. As an example. Also, consider that merely hosting the accounts for a company committing fraud is not fraud itself in much the same way that hosting a website or doing their cleaning, or leasing them a building isn't either.