I just say "No thank you." and keep walking. Stores where you sign something (Costco, Sam's Club, etc) are probably different. I've heard that they aren't check

I just say "No thank you." and keep walking. Stores where you sign something (Costco, Sam's Club, etc) are probably different. I've heard that they aren't checking for shop lifters. https://www.cheatsheet.com/money-career/why-does-costco-check-receipts-when-people-leave-the-store.html/ https://www.cheatsheet.com/money-career/why-does-costco-chec... From the linked article: The first has to do with inventory control. The receipt checkers want to make sure that cashiers are correctly scanning all the items in your cart. The second reason is to make sure that you’re not overcharged or undercharged for any of your items. One former Costco employee on Quora said it was far more common for the checkers at the exit to discover receipt errors than to catch would-be shoplifters in the act. “Surprisingly, in my 12 years working at Costco, the receipt checkers prevented theft at the door by checking a receipt a grand total of zero times,” he wrote. “They did, however, discover a discrepancy on a receipt about two times an hour. Either an overcharge (customer paid for one item twice) or an undercharge (customer didn’t pay for an item).” Cashier error was usually to blame.