Can customers refuse to show their receipt when the store employees ask to see it, when exiting a store?

I always am willing to show my receipt at stores where they request to see it. If I know they’re going to look to see it, I’ll keep it out. I gladly show it, I have nothing to hide, so I willingly offer it. Since I’ve never refused, I don’t know what happens to people who refuse.

Costco, it’s standard they stand at the exit and you have to show it to leave the store. Most Walmart stores do it, although they don’t look at every one. They glance at the receipt and make sure that the things you are walking out with are on the receipt.

I’ve seen this debated on FB, where people who shop at a local Walmart will say they don’t have to show it. I googled it once, and I read that customers have to show it when exiting, when asked. Then today, a friend was saying she won’t. She said they only have the right to see it in Costco, BJs and Sam’s Club.

I’m not debating with my friend but I am just curious if customers have the right not to show their receipt when requested to do so.