The NIP must be served on the registered keeper within 14 days of the offence. Service can be done by first class post, recorded delivery or by hand delivery. A failure to comply with the 14 day time limit is usually fatal to the prosecution case.
The NIP must comply with other requirements which include details of the offence, the date and the location. It must also be signed and dated.
The NIP only needs to be sent to the registered keeper of the vehicle within 14 days to satisfy the service requirement. This is significant because the driver at the time of the offence may be someone other than the registered keeper. In order to ascertain who was driving a number of NIPs may be issued. This would arise if the registered keeper identified someone else who, in turn, nominates another person as the driver. This is very common with vehicles that have been borrowed, sold, hired or leased. The only obligation on the police is to serve the original NIP within 14 days.
Once the identity of the driver has been established the police will then decide on the next course of action. In all likelihood the driver will be issued with a Fixed Penalty Notice or a Court Summons.