If you run a store or shop somewhere, do you have a self checkout? Self checkout is when a customer can ring up their own order at a self checkout register. You essentially swipe your card, either it be a credit card or debit card, and it charges you for the order. You first of course scan your purchases and then ring it up. Does your store have a self checkout? Do you think all stores will one day have self checkout and just people nearby to check receipts? That's what's happening here in the US, if you use self checkout there will sometimes be people there to check your receipt to make sure you didn't sneak anything extra in without paying.
