The official story is the the cart is compared with the receipt to catch errors more than shoplifting [1]. As far as I can remember ever seeing, Seattle Costcos

The official story is the the cart is compared with the receipt to catch errors more than shoplifting [1]. As far as I can remember ever seeing, Seattle Costcos just look in the cart, they don’t search personal bags. [1] https://www.sfgate.com/living/article/Costco-exit-greeters-check-receipts-door-13405328.php https://www.sfgate.com/living/article/Costco-exit-greeters-c...