All testing candidates will need to have their 8-character FTN number (FAA Tracking Number) from the IACRA site prior to registering. (Part 107 Drone applicants - go to iacra.faa.gov/iacra to apply for your FTN.)
To register for an exam, go to faa.psiexams.com/faa/login. Create a login and profile; pay the registration fee (currently $173); and select the site, day, time at which you want to test.
The photo id you present when you arrive to check in MUST contain your current residential address (no PO Box or RR; non-US citizens also need their passport). If your listed residence isn't current, see pg. 4 of the FAA Airman Knowledge Testing matrix (also linked from the faa.psiexams page). If you show up without the appropriate identification, you will not be allowed to test, you will have to reschedule, and pay another registration fee (FAA's rule, not PSI's).
For questions or additional information, contact Peter French at 607-533-4860.