Known as Briefmarke 4.0/4.1, the new stamps is designed to create a bridge between the analogue and digital worlds. The accompanying app allows you to verify the stamp and check it for authenticity. The authenticity check uniquely assigns the stamp to its owner and can be stored in a personal data space (blockchain technology). The crypto stamp is valid for postage, counterfeit proof, interactive and exciting. Can only be returned in unopened packaging
