Does anyone know what the legality is of inadvertantly flying IFR when the flight is filed under another IFR rated pilot's name? Here's what happened: I did an IFR flight with a private pilot who is working on her instrument rating and I was acting as the IFR certified piltot / safety pilot. The flight was originally going to be with another IFR rated pilot and I was asked to fly at the last minute. We forgot to call FSS and re-file under my name... so the IFR flight was flown with me acting as the IFR rated pilot yet the flight was filed under another pilot's name who was not in the plane. My mistake as PIC... is this a mistake that the FAA could take action against me for?