I’ve had this happen with a case of noodles checking out via cashier. It had a barcode on it, which was scanned, but later realized that it was a copy of the co

I’ve had this happen with a case of noodles checking out via cashier. It had a barcode on it, which was scanned, but later realized that it was a copy of the code on the individual boxes so ended up getting 24 for the price of one. Self checkout might have prevented that one as the weight sensor would have tripped.