"For what reason do you fail us, Harbinger? You were given all which you have, and you could not accomplish your mission even with that".
"Two minutes ago, Shepard wiped out all collectors in the galaxy!"
"Ah yes, 'Shepard'; The supposedly immortal organic that killed Sovereign and wiped out your species, who resides in Council Space... We have dismissed those claims".
"The Geth saw him first hand! We shot down his ship; Surely there must have been some evidence in the wreckage!"
"You have to see this from our perspective, Harbinger. We have no evidence of Shepard's existence, only you and your army saw him in your mission".
This should be in ME3, or at least an Easter egg in ME2 if you beat it on Insane.