File the SAR for structuring, but definitely mention the customer's explanation for the cash in the narrative. Note that it is a departure from his original activity and the denominations of the bills he deposits. If you find a respondent here who has some experience and can say it is or is not "normal," that's great, but put it in your SAR anyway.
Your SAR's readers may have enough knowledge to make the call without your analysis.
Last edited by Ken_Pegasus; 10/22/13 09:56 AM.
_________________________
In this world you must be oh so smart or oh so pleasant. Well, for years I was smart. I recommend pleasant.