The Polkadot Decoded NFTs were minted and distributed as POAPs for Polkadot Decoded v3 that was held on June 29th and 30th, 2022, with a fully hybrid experience of online and in-person events. All those who registered were able to claim a one of a kind, unque NFT that they could additionally use as their avatar for the conference. Each tier varied in how rare the NFTs were, with tier 1 being the most rare, then tier 2, tier 3, and so on.