Late service of a claim form raises issues far more serious than might initially be viewed. Since serving the claim form is how the court gains jurisdiction over a Defendant, failing to serve on time can trigger a challenge under CPR Part 11.
This allows a Defendant to argue that the Court has no jurisdiction or should not exercise any jurisdiction. Understanding how CPR 11 operates is critical because Defendants can easily lose the right to challenge jurisdiction if the strict procedural rules are not followed.
When must a claim form be served?
The claim form must be served, in accordance with CPR 7.5, within four months (or six months if being served outside of the geographical jurisdiction) or an application is made to extend the time for service. If it is not:
- Service is ineffective;
- The Court’s jurisdiction over the Defendant is not engaged; and
- Any subsequent steps taken by the Claimant (including late service without a valid extension) are vulnerable to challenge.
Where service is late, the Defendant may argue (in accordance with CPR 11(1)) either:
- That the Court has no jurisdiction because the claim form was never validly served; or
- That, even if jurisdiction exists, the Court should not exercise it, for example, because an extension of time for service was wrongly granted or should not be granted retrospectively.
How does the Defendant challenge jurisdiction?
A Defendant who wishes to rely on late service must, in accordance with CPR 11(2):-
- File an acknowledgement of service, and
- Make an application) within 14 days of filing the acknowledgement of service.
If the Defendant does not do the above within the requisite time, the Defendant is treated as having accepted jurisdiction and cannot challenge it under CPR 11(5).
An example is Hoddinott v Persimmon Homes (Wessex) Ltd [2007] EWCA Civ 1203. The Claimants owned land on which the Defendant had rights under a deed to enter, install a sewer, and restore the land. They alleged that the Defendant failed to do so correctly and sued for breach of the deed, trespass, nuisance, and negligence.
A claim form was issued but not served within four months. Before it expired, the claimants received a two-month extension to serve the claim, citing the need for clarification and settlement. A copy was sent to the defendant for information.
The Defendant sought to set aside the extension, claiming no good reason. After being served, they acknowledged they would defend but did not contest jurisdiction. The Judge initially overturned the extension and struck out the claim, noting the Defendant had already challenged service and didn’t need to apply under CPR 11.
The Court of Appeal allowed the appeal and overturned the strike out. The Defendant failed to apply within fourteen days as per CPR 11, and that was fatal, because it was deemed to have accepted jurisdiction. The Claimant risked making an application to extend without giving the Defendant notice and whilst there was found to be no good reason for not servign in time, because a copy was sent within the four months (albeit not ‘served’) and the claim was not statute barred, the Court of Appeal found that the extension should not have been set aside.
What relief is available to a successful Defendant under CPR 11?
On a successful CPR 11 application, the Court may, in accordance with CPR 11(6), also order, in addition to declaring that it has no jurisdiction or won’t exercise its jurisdiction:-
- set aside the claim form;
- set aside service of the claim form;
- discharge any order extending the validity of the claim form; or
- stay the proceedings.
The opportunities for CPR 11 to be evoked
Claimants often attempt to rescue late service by seeking retrospective extensions under CPR 7.6. This is either an extension sought before the claim form expires (even if the application is heard at a time after the claim form has expired) or retrosepctively.
The latter situation presents greater challenges for Claimants because the Court has even less discretion if the application is made retrospectively. In such cases, the Claimant must demonstrate that all reasonable steps to comply with CPR 7.5 were taken and that they were unable to do so, in addition to making the application promptly.
I once acted for a Claimant where the Solicitors sent the Claim Form for issue. Six months later, the Claimant’s Solicitors began chasing the Civil National Business Centre (‘CNBC’) after being accustomed to long delays in processing new claims. However, the Claim Form had been issued, returned, but had not been received by the Solicitors. An application was made (at the same time of service) under CPR 7.6(3) and was granted on paper. The Defendant (after having made an application under CPR 11 and noting the contesting of jurisdiction in the acknowledgement of service) applied to set aside the Order, arguing that the Court was wrong to have granted the application on paper.
At the hearing, I attempted to argue that the Claimant Solicitors, having experienced significant delays with the CNBC, were reasonable in only beginning to chase the Court after six months. On this basis, they had done all that was reasonable. The Court agreed that the Claimant had failed to take all reasonable steps (such as chasing the CNBC much earlier, even if it led to no response), set aside the Order retrospectively extending the time for service, and made an Order that there was no jurisdiction.
Challenging jurisdiction is not the only remedy available in certain circumstances. In the case of Shiblaq v Sadikloglu (No.1) [2003] EWHC 2128 (Comm) the Defendant sought to set aside a default judgment, alleging improper service. The Claimant had sued for $1,035,000, claiming the Defendant owed money and had agreed to rebuild a yacht at a Turkish boatyard owned by his company. The Claimant stated the Defendant failed to repair and deliver the yacht. Although permission was granted for service in Turkey and notice was posted on the boatyard’s door, the Defendant did not acknowledge receipt. Consequently, the Claimant obtained a default judgment, which they attempted to enforce in Dubai. The Defendant contested the validity of service under Turkish law and sought to set aside the judgment under the CPR, also arguing there was no agreement to refit the yacht, potentially providing a defence.
In this case, the Defendant was unable to rely on CPR 11 because the time had passed to be able to dispute jurisdiction. Instead, the Default Judgment was set aside under CPR 13.2 because service was defective. Interestingly, the Claimant attempted to remedy the defective service with CPR 3.10, CPR 6.8 and CPR 6.9.
CPR 3.10 is not an appropriate avenue
CPR 3.10 says the following:-
3.10 Where there has been an error of procedure such as a failure to
comply with a rule or practice direction—
(a) the error does not invalidate any step taken in the proceedings unless the court so orders; and
(b) the court may make an order to remedy the error.
What this means is the rules will protect proceedings from nulity and can allow matter to proceed even if there was a technical error, subject to the Court’s discretion.
For example, in Pitalia v NHS England [2023] EWCA Civ 657, CPR 3.10 could be used to remedy the application to challenge jurisdiction because the Defendant had failed to tick the appropriate box in the acknowledgement of service, and the application was not explicitly made under CPR 11 to challenge jurisdiction. The Court of Appeal found that the application made could be treated as an application to challenge jurisdiction as CPR 3.10 allowed the procedural error to be overlooked.
However, that did not mean that CPR 3.10 could be used to remedy a failure to serve the claim form. However, there can be specific examples where it can apply. For example, Bank of Baroda, GCC Operations v Nawany Marine Shipping FZE [2016] EWHC 3089 (Comm), the Claimant failed to serve more than one copy of the Claim Form for each of the Defendants. The High Court found the step taken to serve was defective but not completely omitted. Therefore, the defect could be remedied under CPR 3.10.
Avoid jursidiction issues overall
CPR 11 highlights to civil litigators that the biggest risk is failing to serve the claim form at all, which allows a Defendant to challenge jurisdiction with limited recourse for the Claimant. Neglecting proper service can be costly and should be avoided whenever possible. Although minor service defects can sometimes be corrected under CPR 3.10, especially if the service was generally proper and the defect does not invalidate it, this should not be relied upon as a fallback.
In personal injury cases where the claim form was not validly served, it may be better to issue and serve a new claim form, even if the limitation period has expired. This approach could strengthen the claimant’s position to seek relief under section 33 of the Limitation Act 1980 should time limitations become an issue. Ultimately, careful and correct service is the best way to prevent jurisdictional challenges under CPR 11.
Information
AJH Advocacy Limited, a Limited Company which is regulated by the Bar Standards Boards (entity number 190758), ceases trading on the 12th January 2026.
From the 12th January 2026 and onwards, Alec Hancock will practice as a Barrister at Magdalen Chambers in Exeter. For instructions on matters on or after 12th January 2026, please contact Magdalen Chambers via clerks@magdalenchambers.co.uk or by telephone on 01392 285 200.