At its core, it is a digital stamp and an app. If you want to send a parcel, you’d simply stamp it with a device that uses a laser to etch it with your name and a unique identifying pattern. After that, the USPS would pick up your package; from there, the app would prompt you to provide the name of the person you’re trying to reach.
The problem is, will such a fine print even survive a journey?, how far can you send it before all the handling and sorting will make the mark unreadable to the sorting machines in the delivery office, or even worse maybe they will mark it as a fraudulent stamp(as someone has to pay for the shipping in some way) and they will "throw" it away"
Link to Original Source