If a SAR is completed for cash withdrawals that appear to be a structuring situation, and the member continues to withdraw cash, do we have to complete a SAR for every withdrawal with an ongoing aggregate of cash withdrawn?

Just an FYI, you'd probably get more attention if you move this to the BSA forum.

If you file a SAR for structuring and the activity continues, you file another SAR within 90 days of the first filing and every 90 days thereafter. You don't need to file a new SAR each time they structure. Each update would aggregate the cash activity of the prior reports.

Now, if they engage in another suspicious activity (ie. kiting/mortgage fraud) you would file a new SAR on that and not wait for the 90 day update.