It not backed by Sui Foundation but Sui Fam Official you can look for this in X but it still legit. Make sure you access correct site

Yes, http://SuiPassport.app is an official app by Sui Foundation.

You can safely use suipassport.app, as it is officially recognized by the Sui Foundation and was developed in collaboration with Mysten Labs. This site serves as a trusted platform for verifying your Sui identity and participating in Sui ecosystem activities like NFT mints and loyalty programs. If you're planning to mint an NFT, using Sui Passport ensures you're working within the authentic Sui ecosystem. The platform uses your wallet signature to issue identity badges or access specific drops, and it's designed to protect your privacy while confirming your participation in the network.

To verify legitimacy, always check that you're visiting the correct domain and that the site prompts wallet interaction through trusted wallets like Sui Wallet or Ethos.

To learn more about how Sui Passport works and how it's used within the ecosystem, visit: https://docs.sui.io/ecosystem/sui-passport

Transaction Block Example You might interact with Sui Passport using this type of transaction:

sui client call --function mint_passport --package 0xpassport_package --args 0xuser_wallet --gas-budget 10000000

Using Sui Passport not only confirms your identity but also unlocks future benefits from verified participation.