I was at the shopping centre a few years back, came back to where I parked my car, and it was not there. Convinced it had been stolen, I went to the Concierge desk and reported it. A young man in a buggy came to pick me up. We drove to where I had parked my car, and indeed, it wasn't there. He said, "Are you sure you parked on this floor?" I was sure. He drove me to the lower floor, and there it was, in exactly the same spot as I left it, one floor below ! It was embarrassing, but at least we found it in the end.
Yes, very few times, but that is because I learnt my lesson early on. Once we parked at the airport and rushed off to catch our flight. Upon return we searched for our car for 2 hours or more and it was past midnight. Ever since I try to either take a picture of the parking bay or remember the directions to my car. But recently I learnt from my nephew by holding up and pressing the open or close button on your key will allow it to start beeping and you know where your car is!