NFTs (Non-Fungible Tokens) mean that your cards are unique and cannot be replicated or duplicated as each card is personalised with specific flight information. NFTs are stored on a blockchain, a digital ledger that securely records all transactions with the token. Once a reward has been redeemed, the cards used are burnt and cannot be recovered.
The cards you receive through Uptrip are not automatically NFTs. They can become NFTs (Non-Fungible Tokens) when you connect your crypto wallet to Uptrip and mint your cards as NFTs on the blockchain.