I was once told to do that (put evertything in the bag).I has ALOT of clothe so I told the cashier that I would not take anything, as at the ON I usually shopped at never made me do that.And when the manager heard me say that she approved for me to get the 20% off but to make sure she took my bag. In another time I went and forgot my bag, the cashier asked if I was paying with my ON card, and since I was she took the dicount without having the bag.