A pilot must carry a government issued photo ID, pilot certificate, and medical certificate.

When exercising the pilot privileges as a required flight crewmember, the pilot must have in physical possession, or readily accessible in the aircraft, a valid pilot certificate or special authorization.  In addition, the pilot must have photo identification.  The identification can be state issued such as a driver’s license, or federally issued such as a U.S. Armed forces ID or passport.  The pilot must also have a valid medical certificate for the level of pilot privileges being exercised.

Reference(s):

14 CFR 61.3 Requirement for certificates, ratings, and authorizations.

Other Pilot Certificate Items