Swapping price stickers on items is as old as the hills. It's also still a form of theft.
The newer markdown stickers are also barcodes that encode the details of the original item and the price.
However there's more and more connection between the stickers that are produced and what gets scanned at the till, and given most of the tills (even the self service ones) now contain cameras you'd be a brave person to try and play the system when they start to notice markdown barcodes being scanned that haven't been officially issued in the store.
Swapping price stickers on items is as old as the hills. It's also still a form of theft.
The newer markdown stickers are also barcodes that encode the details of the original item and the price.
However there's more and more connection between the stickers that are produced and what gets scanned at the till, and given most of the tills (even the self service ones) now contain cameras you'd be a brave person to try and play the system when they start to notice markdown barcodes being scanned that haven't been officially issued in the store.
Anyway, memes.