ECM Software Update: How to tell if I need it?

[dmanthree]

Just got the notice in the mail about the software update for the potential misfire. Is there any way to tell if this has already been done? My car was in the shop for a different reason, but would they have done the work while it was there?

 

[TWGEN]

If it was done, it would be noted on the completed service paperwork. I recently got the notice in the mail and it was already done on the last service.