Wrong- Your sales advisor has access to your Tesla account and they can see it in their screen. My Sales adviser flipped his laptop around and showed me so I could verify he typed it in correctly. I also had trouble and needed to add it after the order was placed but a couple weeks before I took delivery. If your sales adviser is a prick and refuses, wait until he is out of the store and ask another. I had two I really liked and they bent over backwards to follow up on all my requests. Good luck.you can't see if the referral code was applied until delivery and after delivery it is impossible to correct.