Link digital and printed media together. We managed to do that with a competition mailshot. To draw attention to our new home page we sent this decoder mailshot to our contacts. You get to our home page via a QR code, and with help from the decoder from the mailshot, you can solve a riddle. It makes encrypted text or hidden images visible. Only the owner of a decoder can see the solution to the prize competitions. Play on your customers’ curiosity and bring some excitement into your advertising campaigns.