Toon Player Avoids Prosecution!
But his solicitors were able to provide proof of postage, which they said shows Duff responded to police requests.
Northumbria Police denied receiving any correspondence but because it was not sent by registered delivery, it could not be established if it was lost or mislaid, and the case was dropped.
Duff's Mini Cooper was spotted doing 86mph on a 50mph stretch of A1, at Seaton Burn.
Last October, Duff appeared in the same courtroom following an incident in which his Range Rover was clocked at 102mph.
Duff was convicted of the offence in September and was hit with a £100 fine and three penalty points.