From 1962 to 2007 there have been 86 witnesses to various types of events that corroborate, verify and enforce Billy Meier's experiences.
The types of events are as follows:
- clean-shaven Meier departs & returns a day later with a many-day growth of Beard, after a (5-day space-trip) contact,
- had a Daytime sighting of a beamship or related craft,
- caught sight of one of the ETs, such as Quetzal, Ptaah or Asket,
- saw the Fir tree that Semjase posed her ship on all sides of after it was damaged, glowed in the dusk and later disappeared,
- saw and/or photographed a crop-circle like pattern in the Grass or in ice soon after a contact,
- Heard the sound of a beamship, or its loud noise made during a tape-recording session, or a related UFO sound,
- Heard the voice of a Plejaren or Plejaren associate speaking to Meier,
- witnessed Billy receiving or sending a teLepathic message, as confirmed by an immediately following event,
- had a Nighttime UFO sighting associated with one of Billy's contacts or with a night "UFO demonstration,"
- had a Nighttime beamship sighting while Meier was aboard the craft and in radio communication with the witness,
- Passed PSE (Psychological stress evaluation) test,
- viewed Billy's dozen or so photos of how San Francisco would look after a future devastating earthQuake,
- took photo(s) of the craft/beamship
- saw Billy suddenly Return or appear after a contact,
- viewed the disappearing Tree demonstration,
- noticed Billy suddenly Vanish (just before a contact),
- Witnessed Billy rapidly typing out a Contact Report the day or so after, at a speed much faster than is normal for him.