opting instead to include a RSVP QR code. In addition to ensuring that no card gets lost in the mail and saving you a bit of money on your invitation suite, this option means you'll be able to ...

You don’t need an app for this —your phone can do it already. The humble QR (or Quick Response) code has become ubiquitous. Invented back in the 1990s to scan car parts, the barcodes got a ...