CFI Renewal
I must have renewed my CFI three or four times based on activity and never took a quiz. This was ten years ago I and things changes, but I don't believe the FAA can do that if you are renewing based on activity.
Just like AZaviator, I had similar experiences renewing at the Scottsdale FSDO. Very quick and simple process, and I was treated courteously and professionally the two times I renewed there.