Costco is testing a new system at some stores that requires members to scan their membership cards at the entrance, instead of just showing the card to employees. This is aimed at cracking down on non-members accessing Costco by using someone else's membership card, a practice that has increased during the pandemic. Costco already requires shoppers to show their membership card and ID at checkout, including self-checkout. The new scanners are meant to speed up entry and checkout processes while restricting access only to cardholders.