While trying to sell SMS text to a restaurant owner, he asked me how did that worked exactly. So then I said: "Well, you say in your text just to show their cell phones with the coupons at the counter, and they'll automatically get a rebate this way." "Yeah, but what if my staff simply declare too many coupons?At least, with paper coupons, I have a paper trail so I can count exactly how many were redeemed" I couldn't find a proper counter to that problem. I use long codes and I was told it wasn't possible to track/confirm that each recipient received the SMS. If you have a solution, any help is appreciated.