I’m so pissed off because I’ve just sent money in a card to a relative using the new stamp which I bought at a supermarket. Nowhere on the stamp book packaging did it say ‘do not detach barcode) so I assumed it was something I should hang on to so I could track the letter. Now I learn that you have to keep the barcode on if the stamp is to be considered valid- aaargh! Why serrate the edge between the stamp and barcode if they don’t want you to detach it? Why no instructions on the bloody packaging?! Surely I am not alone in being caught out by this? AIBU?