You have to have a photo I.D., your pilot’s certificate, and your medical certificate on you at all times while you are flying
The photo I.D. can be a driver’s license, a passport, or other forms that the FAA finds acceptable
If asked to, you have to provide either your airman certificate, medical certificate, or license plus your photo I.D. to:
The FAA Administrator
A representative of the National Transportation Safety Board
Any federal, state, or local law enforcement officer
An authorized representative of the Transportation Security Administration