Ever wondered why seemingly harmless Amazon packages are suddenly landing on your doorstep with no sender name, no return address—just a mysterious QR code tucked inside, inviting you to scan it?

“Don’t look a gift horse in the mouth” is a go-to saying when you receive something for free. However, if you get a package addressed to you with a QR code asking you to find out who sent it or with ...

Add Yahoo as a preferred source to see more of our stories on Google. Have you ever received parcels you didn't order? (Matt Molloy via Getty Images) An unexpected parcel arrives at your door. You ...