[ApolloFortyNine]

Sam's club has 'the arch', and one time when I did self checkout I did miss an item (thought I scanned it and I didn't apparently) and so far that's the only time they've actually checked the cart, the rest I was just waved through.

So seems pretty good. Obviously erring on the side of having an employee double check makes sense when their profit margins are generally single digits. One missed tshirt means they lost money on your $300 cart.

[wincy]

Well, Sam’s Club and Costco are kind of their own things since they’re members only, you sign an explicit agreement with them saying it’s fine for them to look at your cart, and if you refuse they can just revoke your membership and refuse to do further business with you. You’re under no obligation at Walmart or Target to get your receipt checked, although most people are polite and fine with it.

Personally, I always just say “no thank you!” and walk past the receipt checker at non members stores. They know me at Walmart and know I’ll refuse the receipt check and stopped bothering me.

[Marsymars]

The explicit agreement also says that you'll return your shopping cart to the coral, and see how well that works.