Walmart receipt codes

Has anyone else noticed there’s a strange series of numbers across the bottom of Walmart receipts? I asked the customer service reps and they’ve never noticed it. Heck, some of them ask me what I’m talking about. It’s got hyphens between each series of numbers. I took a picture to post, but this app doesn’t seem to want to let me use photos. <br><br>I can’t help but wonder what they’re for. I want to play with it. When I scan the code, it says it’s an invalid code. <br><br>Does anyone else see this on their receipts?<br><br>I’d love to hear someone else’s thoughts or experiences on this.