Are you talking about doing an audit in an electronics store or office supply store? You have to identify products on the floor. For one version of this assignment, I believe they were mostly printers. It was a little nerve-wracking at first, especially because I had to recognize whether the model was operational for the customer to try in addition to knowing each model. While doing a mystery shop in the same store later, I met a woman doing the audit. We had a discussion about it. She said they get easier because you know the store is nearly always going to have four models of this or one model of that. She could stand in one place and just point to the other aisles and say, "That one's a. . . ." If I remember correctly, there is some terminology you have to get used to if it is an office supply store. Part of it was whether the product (printer paper) was "rainbowed" or "framed" on display. There was also a question about whether the paper had been recycled or whether you could recycle used toner cartridges at the store. Eventually, the company had a test I had to take to prove I knew the terminology. I believe these two different assignments were for two different clients, but it's been so long I can't remember right now. For the one that was a mystery shop and not an audit, I can't see how the staff wouldn't know you were the shopper.