i do not think that showing a Bill at the Exit will be a good idea . I will not prove that somebody really came to shop. What if a Guy from Opposite office parks his car in the morning and then comes over in the evening and buys a PEPSI/Juice for Qr 1.00/- and shows it bill at the gate as a proof of purchase [or maybe a kilo of Tomato] and goes home drinking the above laughing and thinking how he fooled the Management of CC.

They will have to come up with some better idea.....any one...