The passport card is also an option, one that’s small enough to fit in a wallet. It can be used to cross land borders, and to fly domestically (but not internationally).
Unlike most driver’s licenses, a passport card doesn’t expose one’s address. This makes it a great form of ID to use in non‐airport situations as well.
> Unlike most driver’s licenses, a passport card doesn’t expose one’s address.
Coincidentally, this is also how it works with German passports. You're legally required to have either an ID card or a passport (or can have both.) The former has your address and comes with a bunch of ever-changing digital signature/ID features (that you need a special reader or app for). The latter is just a biometric (still RFID but well) passport, with only the city (issuing authority) listed.
