The post, spotted by Android Police, specifies that the feature will only be available in the U.S. to start.

Users scan their passport with Google Wallet to add it as an ID pass, and can then perform identity verification by connecting their phone to an NFC scanner or scanning a QR code generated by the ID pass. They are still recommended to carry a physical copy of their passport, however.

The feature is not currently live, but expected to be included in an imminent update.