As said it must be posted within 14 days, not received.
The refference to SECTION 172 of the ROAD TRAFFIC ACT 1988, doesn't apply UNTIL a offence has been established, but few people know that, failing to satisfy that a crime has been commited, to the court to start with has been used as a get out.
I received a NIP on 12/12/08, based on the evidence of a camera operator!!, NIP can ONLY be issued on the evidence of a POLICE OFFICER, anything less is hearsay.
The reason why all pictures of speeding must be watched and agreed with by plod before issuing NIP.
The sent me a NIP and asked me who wasa driving the car(my car) at the time, I told them to FO until they have sent me PHOTGRAPHIC evidence of any alleged offence before I would comply with section 172, I am still waiting, mind you the last 5 times I am still waiting and some are over 8 years ago.
tabetha