The 14-Day NIP Rule: What Every Motorist Should Know

When someone is accused of a motoring offence (for example, speeding), the law requires that they be given timely notice that a prosecution is being considered. This notice is called a Notice of Intended Prosecution (NIP). The notice can be verbal or in writing.

One of the most important protections for a driver is the so-called “14-day rule”  if that notice is not correctly given verbally or served within 14 days of the offence, any ensuing prosecution is often invalid. The rule has been around for decades but was made famous by David Beckham a number of years ago when it was argued successfully in a case he defended.

The rules around service are technical, and there are exceptions to the rule. If you believe your NIP was flawed or late, it could form a strong ground for dismissal.

How the law says a NIP must be served

Under section 1(1A) of the Road Traffic Offenders Act 1988, a written notice may be served:

• by personally delivering it;
• by addressing it to the individual and leaving it at their last known address; or
• by sending it via registered post, recorded delivery, or first-class post, addressed to their last known address.

Sections 1(2) and 1(3) elaborate:

• If the NIP is sent by registered post or recorded delivery, then service is deemed to have taken place even if the notice is undelivered or not received. This is an irrebuttable presumption of service.
• If it is sent by first-class post, service is presumed unless the contrary is proved (i.e. a rebuttable presumption).

In other words, for first-class post the driver may put forward evidence that the notice did not arrive in time. Because registered or recorded delivery service carries the irrebuttable presumption of service, a defendant cannot argue “I never got it” if it was validly addressed and posted.

The vast majority of notices are not sent by a recorded method so if not received within 14 days of the offence, you may be able to defend a prosecution on that basis; the defendant can show that, despite being posted, the notice did not arrive within 14 days (for example through postal delay, misdelivery, or evidence of late receipt).

To be valid, the notice must be posted at a time so that, in the ordinary course of the post, it could reach the defendant within 14 days. If it was posted too late to reach them in time under normal postal operations, section 1 is not complied with.

When posting late or postal disruption invalidates service

Even if a NIP is posted, it may be invalid if the timing or conditions prevented it from being delivered within the 14-day window. A few key principles and cases:

• Posting so late that the letter could not reasonably reach the addressee within 14 days in the “ordinary course of post” is not enough. In Nicholson v Tapp (1972), a notice sent too late to reach the defendant in the ordinary course was held invalid.
• In Groome v Driscoll [1969] 3 All ER 1638, the notice was sent by recorded delivery the day after the offence but was only delivered 21 days later. The court held that as long as the notice was posted in time for normal delivery, section 1 was satisfied.
• In Gidden v Chief Constable of Humberside [2009] EWHC 2924 (Admin), a postal strike caused the notice to be delivered after 14 days, even though posted well in time. The court set aside the conviction, accepting that the actual late delivery defeated service.

The accident exception: when 14 days does not apply

The 14-day requirement for notice to have been served does not apply where, at the time of the offence or immediately afterwards, an accident occurred owing to the presence of the vehicle.

However, the exception is limited:

• The driver must have actual awareness (or at least awareness of some accident). If the driver genuinely did not know an accident had occurred (for example, a barely perceptible contact), courts have held that the exception may not apply and a NIP is still required.
• In Bentley v Dickinson [1983] RTR 356, a driver reversed into a parked car but claimed not to have been aware of the collision at the time. The courts held that a warning (NIP) would have been required, because the driver did not perceive an “accident” at the moment.

Common prosecution replies and how they are tested:

1. “We posted it in time, so it counts.”
   Posting in time is not enough if you can prove it was delivered late. The presumption of delivery can be rebutted, and late actual delivery defeats service.
2. “We could not identify the keeper within 14 days.”
   There is a statutory relaxation where, despite reasonable diligence, the keeper’s details could not be obtained in time, or where the defendant’s conduct contributed to the failure. This is fact-sensitive and open to challenge.
3. “There was an accident, so no NIP was needed.”
   Test whether the driver perceived any accident. If not, the exception may not apply and the 14-day rule may revive.

A recent success story

The team at Geoffrey Miller Solicitors achieved discontinuance of a speeding case last month where the defence was purely based on the 14 day rule.

The defence was that our client did not receive the Notice of Intended Prosecution (NIP) within the statutory timeframe of 14 days. The original speeding offence took place on 13 March 2025. Therefore the notice must have been served by 27 March for the mandatory rules on service of a Notice within 14 days to be met.

The NIP was dated 17 March 2025 and police admin staff claimed it was posted out that day.  The rules state that the notice is “deemed” served two business days after it was posted. Therefore if the notice was sent on 17 March, it will be deemed served by 19 March which is well within the 14 days time limit.

Our client went abroad with his wife on the morning of 28 March 2025 and received the notice only on their return on 31 March. We had clear evidence from our client and his wife that their post box that was physically checked on the morning of their departure was empty proving that the notice was not served by the final day it could have been for the 14 day requirement to have been met.

The case was thankfully discontinued shortly before the trial so neither our client nor his wife had to attend court to give evidence but we were ready for them to do so and confident the court would have found in our client’s favour if they gave evidence at trial.

Quick checklist for motorists and fleet managers – What evidence to collect to challenge valid service of a NIP

To mount a successful defence based on late or improper service, it would be wise to save evidence to support your defence such as:

1. The envelope and notice itself, preserving all postmarks, barcodes, franking or recorded/registered delivery marks.
2. Jot down your recollection describing the date and circumstances of when the notice was actually received (if it was). (It definitely helped our case above to have a specific recollection linked to a trip abroad that could be proven with evidence of travel bookings.)
3. Postal disruption evidence (for example, records of strikes, Royal Mail manifest data, or delay bulletins).
4. DVLA / keeper documentation (V5C, change of address forms) to prove that you were the registered keeper at the time and the address was correct, or explain any recent moves. NB. Delay caused by a change of address will not be a defence.
5. Company or lease chains. Where a vehicle is leased or a company car, obtain the chain of NIPs to show whether the first notice was out of time. Only the initial notice must be served within 14 days.
6. Accident exception facts. If the police rely on the accident exception, gather evidence about what was perceived at the time. Photographs, damage reports, dash-cam, and witness accounts may show there was no apparent accident and that a NIP was still required.

With that evidence, you can argue that the presumption of service is rebutted (in first-class cases) or that service was never properly effected at all.

How courts have decided in real cases

Here are a few key cases for further reading that illustrate how these principles are applied:

• Gidden v Chief Constable of Humberside – late actual delivery despite timely posting defeated service.
• Groome v Driscoll [1969] 3 All ER 1638 – sending by recorded delivery in time for normal delivery satisfied the rule.
• Bentley v Dickinson [1983] RTR 356 – the accident exception was scrutinised; where a driver lacked awareness, a warning notice was required.
• Phipps v McCormick [1971] Crim L.R. 541- addresses “last known address” in circumstances where the defendant was in hospital.
• Burt v Kirkcaldy [1965] 1 All ER 741 – service via a family member (wife) authorised to accept mail was valid service.

These cases help illustrate how courts navigate the balance between procedural fairness for the driver and the administrative need for timely prosecution.

Paid consultation

At Geoffrey Miller Solicitors, we routinely advise clients on challenging defective NIPs. We can audit your notice, assess whether the 14-day rule was correctly met, and advise of the merits of a defence via our paid consultation service (priced at £250 plus vat (£300).