I got a 3.4oz bottle of Terre d'Hermes from Amazon a few years back for only $50 shipped that had the code scratched off. It was my second bottle and I could tell it was the real thing from a side by side test so I didn't much care. I think I saw someone explain on here that some discounters will erase/cover up/scratch off codes of legit items just so there is no way to trace where the bottle has been from. If there is a code on the bottle I would feel OK. Sometimes the bottles and their boxes/containers get mixed up, which might account for the codes not matching and perhaps the can you have is an older one where JPG used to put a sticker on the canister (I think I remember them doing that years ago) and someone just removed it.
On a side note the "big red star" makes us display bottles out of their boxes in our shelves. This is usually live product so we have to unwrap it, display it and then box it up again to sell when our stock gets low. I absolutely hate this practice and try my best to only display testers, but that is not always possible since we have to display anywhere from 3-9 bottles. So sometimes when my colleagues are re-boxing the display bottles they don't check to make sure the code on the box matches the code on the bottle. Some people do not want to buy a bottle without the cellophane wrapping, which I can understand. Luckily I haven't yet had a complaint of the codes not matching. Just FYI :}