We haven't had any issues with Walmart, Amazon, Best Buy and Apple all year and the last six weeks? Well, in any given day there is at least 1 or 2 deliveries, sometimes 3 ... we are actually kind of surprised and we order a lot of stuff online.
However, normally I buy my oil at the Walmart store though over the years at times ordered online from them, no issues.
Sometimes its just "the system" in someones area I guess.
You can't be forced to show your receipt, you pay, you are done, depending on my mood I will walk right past them and anyone else. Sometimes I feel bad for the door checker and I will stop. We haven't had receipt checkers in some time but have notice them this holiday season. All out check outs are self check out too. I bet a total of 24 self check outs and maybe one or two non self check out. I suspected maybe why someone at the door this holiday, literally everyone checks them self out now.