The second-hand economy is booming – yet trust is still its weakest link. Buyers often hesitate due to concerns about counterfeits, stolen goods, or unverified product condition. But imagine a world where resale platforms could verify the originality of goods with traceable ownership history, like a digital passport. What if every pre-owned item came with an unbreakable chain of authenticity?   How should a second-hand marketplace that builds trust between sellers, buyers, and platforms be made user-friendly? What kind of technologies and processes could be utilised to enable tracking on a good enough level?   This project revolves around the culture that cherishes recycling and explores the opportunities to make it a true option for an even bigger audience. As an end result, demos of user interfaces and working logics of such a system are expected as an outcome.