This guide is maintained as a current resource for September 2026 and covers only the laws of England and Wales. Information is for general guidance, not legal advice. Consult a qualified solicitor for advice specific to your situation.
Discover how to challenge a codicil to a will in England and Wales, including legal grounds such as lack of capacity, undue influence, improper execution, and ambiguities. This comprehensive guide explains practical steps, evidence requirements, time limits, and procedural options for disputing contested codicils.
A codicil is a legal document that amends rather than replaces an existing will. Like a will, a codicil forms part of the estate planning framework of an individual and, if valid, must be taken into account during probate. However, codicils can be susceptible to dispute for the same legal reasons as wills, especially where the changes significantly affect beneficiaries or the testator's intentions. This article explains how a codicil can be challenged in England and Wales, the legal principles involved, common grounds for dispute, practical steps, and key risks to consider.
What Is a Codicil and Why Might It Be Challenged?
A codicil allows a testator to make minor amendments to an existing will - for example, changing a beneficiary, appointing a new executor, or updating specific gifts - without rewriting the entire document. However, because codicils affect the distribution of an estate and form part of the will, they are subject to the same formal requirements and legal scrutiny as wills themselves. A challenge may arise when there are concerns that the codicil is invalid or unfair.
Legal Requirements for a Valid Codicil
For a codicil to be valid, it must comply with the same formalities as a will under the Wills Act 1837:
- The codicil must be in writing.
- It must be signed by the testator, or by someone else in their presence and at their direction.
- The testator's signature must be made or acknowledged in the presence of two independent witnesses who also sign the codicil in the presence of the testator.
- Witnesses must be independent (not beneficiaries under the will or codicil, nor spouses of beneficiaries).
Failure to meet these formal requirements can make a codicil invalid and lead to legal challenges.
Grounds for Challenging a Codicil
The main legal grounds for challenging a codicil mirror those in contested probate for wills. A successful challenge depends on demonstrating facts that undermine the codicil's validity or fairness.
1. Lack of Testamentary Capacity
The person who made the codicil must have had the mental ability to understand the effects of the amendment and the extent of their estate when they signed it. Concerns often arise where the codicil was made late in life, close to death, or when serious illness or cognitive decline was present.
2. Lack of Knowledge and Approval
Even if the testator had capacity, they must have known and approved the contents of the codicil. If there is reason to believe the testator did not understand the effect of the changes - for example because someone else drafted the document or it was explained poorly - this can be a ground for challenge.
3. Undue Influence or Duress
If a challenger can show that the testator was coerced or unduly pressured into signing the codicil - particularly where the changes benefit someone who was closely involved in the testator's life - the codicil may be rendered invalid. In probate law, the level of influence must be significant enough to override the free will of the testator.
4. Improper Execution
A codicil that fails to meet formal execution requirements can be invalid. This includes absence of proper witnessing, incorrect signing procedures, or irregularities in the document's preparation. Because codicils must comply strictly with execution rules, any deviation can provide grounds for challenge.
5. Ambiguities and Conflicting Provisions
Poorly drafted codicils that introduce ambiguity or conflict with the original will can lead to disputes. For example, multiple codicils that contradict each other or a codicil that refers ambiguously to provisions in the will can result in litigation to resolve those inconsistencies.
Timing and Time Limits
There is no strict statutory time limit for challenging a codicil on grounds such as lack of capacity or undue influence. However, delays can be detrimental. In James v Scudamore [2023] EWHC 996 (Ch), the High Court dismissed a challenge to a codicil after an unjustified delay of several years, emphasising that unreasonable delay can bar a claim under the principle of laches.
Where related claims are brought under the Inheritance (Provision for Family and Dependants) Act 1975, there is generally a six‑month limit from the date of the grant of probate. But this limit applies to claims for reasonable financial provision, not to challenges to validity itself.
Acting promptly after the testator's death and before the grant of probate can preserve rights and evidence, and allow applicants to lodge a caveat to prevent the grant of probate while the dispute is resolved.
Practical Steps to Challenge a Codicil
1. Review the Documents
Obtain the original will and all codicils. Compare dates, signatures, witness details, and the specific changes introduced by the codicil. Establish which provisions are at issue and whether there are internal inconsistencies.
2. Gather Evidence
Supporting evidence is essential. This can include:
- Medical records indicating capacity around the time the codicil was made.
- Witness statements from those present at execution.
- Solicitor's notes or correspondence describing instructions given by the testator.
- Communications concerning the drafting and signing of the codicil.
3. Consider Protective Steps
if probate has not been granted, you may apply for a caveat at the Probate Registry to stop the grant while the dispute is investigated. This prevents estate assets being distributed prematurely.
4. Seek Specialist Advice Early
Codicil challenges involve complex factual and legal issues, often interwoven with emotional family circumstances. A solicitor with experience in contentious probate can assess the strength of your case and guide your next steps, including negotiation or court proceedings.
Risks and Considerations
- Evidential burden: Evidence must be strong and well‑documented. Weak arguments based on speculation are unlikely to succeed.
- Costs and delay: Contentious probate litigation can be costly and slow, and costs may not be recoverable.
- Impact on estate administration: Disputes over codicils can delay probate and distribution of assets, affecting all beneficiaries.
When possible, consider alternative dispute resolution such as mediation, particularly in complex family situations where relationships matter beyond the estate.
Key Takeaways
A codicil to a will can be challenged in England and Wales on the same fundamental grounds that apply to wills: lack of testamentary capacity, lack of knowledge and approval, undue influence, improper execution, and ambiguity or conflict with the original will. To pursue a challenge, it is important to act promptly, gather relevant evidence, and consider protective steps such as lodging a caveat before the grant of probate.
Challenges to codicils can be complex and may affect the wider estate administration process. Seeking specialist legal advice early can help clarify options, strengthen your position, and manage risks.
