An employee of a business customer refused to provide SSN for a reportable transaction. Teller conducted the transaction.
In an attempt to re-track this thread, I'll note that I'm responding to the apparent circumstance that this was a face to face transaction, not an attempt to get the number in connection with aggregated transactions.
I agree that refusing to provide the SSN should trigger consideration of a SAR and I would not call a decision to file defensive. However, my greater concern is that the employee carried out the transaction anyway. rlcarey seems to be rattling the same bars in suggesting that the employee be listed as a suspect on the SAR. I don't think either of us would actually do that, but if I did file a SAR on the person presenting the transaction I would feel compelled to include a paragraph describing the consequences for the employee. They would be significant.