Banks are not the police. They submit their findings to the UNODC and the FIC. From there on the information enters the state prosecution machinery and depending on how connected you are, they either act immediately or file it in the "Someone Else's Problem" cabinet.
The UNODC however, as was recently in the media, start becoming jumpy that none of these reports are being dealt with locally. They start demanding audits, issuing threats of downgrades, sanctions and what not.
United States put sanctions on South African-based ISIS members — here are their names The U.S. Department of the Treasury’s Office of Foreign Assets Control (OFAC) has designated four Islamic State of Iraq and Syria (ISIS) and ISIS-Mozambique (ISIS-M) financial facilitators based in South...
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