The 14 day rule relates only to the period of time in which the Police/Process Unit must serve the original Notice. The Police do not have to prove that the Notice reached its intended recipient within 14 days, merely that they believe that it arrived, but there may be a defence available if the intended recipient can convince a Court that the notice did not arrive in time or at all. In many cases, the registered keeper will be a lease company not the actual driver, with the result that even if the driver is unaware of the incident, service of the Notice is good if it was sent to arrive at the registered keeper's last known address within 14 days of the offence.