Since the first SAR is filled with “transaction with no apparent economic, business or lawful purpose”, subsequent transactions from the same account would beco

Since the first SAR is filled with “transaction with no apparent economic, business or lawful purpose”, subsequent transactions from the same account would become "transactions with no apparent economic, business or lawful purpose". So, Banks are on the hook to file subsequent SARs. Banks exit customers after a couple of SARs in the name of de-risking. One way to avoid getting out of this trap is to join the club of "private banking" services provided by big banks. It is like Airline's first class vs. economy class customers. Banks put different resources for private banking clients such as: (a) manual override by humans (b) reduce false positives by algorithms by tweaking parameters (c) specialized representatives, cust service folks.