How to Challenge a Codicil to a Will

A codicil is a legal document that amends or supplements an existing will, allowing a testator to make changes without drafting a completely new will. Like a will, a codicil must meet strict legal requirements to be valid. If these requirements are not met or if there are concerns about how the codicil was made, it can be challenged as part of a contentious probate dispute in England and Wales. This article explains when and how you can challenge a codicil, the legal principles involved, the practical steps to take, time considerations, possible outcomes, and common questions that arise.

What Is a Codicil and Why It Matters

A codicil forms part of a will and can make specific changes to its terms. It must be signed and witnessed in the same way as a will to be legally effective, and it should clearly identify the existing will it amends so that it can be read together during the probate process.

Codicils are commonly used to make minor changes, such as updating executors, changing a beneficiary's name, or adjusting particular gifts. However, poorly drafted or executed codicils are a frequent source of dispute because they can alter key provisions of an estate plan or introduce ambiguity into the testator's intentions.

Legal Basis for Challenging a Codicil

In England and Wales, the grounds for challenging a codicil are generally the same as those for challenging an entire will. A codicil will be invalid if the testator lacked capacity, was unduly influenced, did not know and approve its contents, or if the document itself was not properly executed in accordance with the legal requirements for wills.

More specifically, challenges may be based on:

• Lack of testamentary capacity at the time the codicil was executed, meaning the testator did not understand the nature and effect of the changes.
• Undue influence or coercion, where pressure or manipulation affected the testator's decision to make the codicil.
• Lack of knowledge and approval, where the testator did not genuinely understand the terms of the codicil.
• Improper execution or failure to meet statutory formalities (for example, insufficient witnesses or incorrect signing).
• Fraud or forgery, including alteration of the codicil or fabrication of signatures.

These legal principles reflect the statutory framework that also applies to wills under the Wills Act 1837 and related case law in contentious probate.

Who Can Challenge a Codicil?

To challenge a codicil, you must have a sufficient interest in the estate or potential benefit under an earlier will or intestacy. This commonly includes:

• People who stood to benefit under a previous will but are disadvantaged by the codicil.
• Close family members (such as spouses, civil partners, children, or dependants) whose inheritance rights are affected.
• Beneficiaries under the original will whose interests are altered by the codicil.

Simply being disappointed by the terms of a codicil is not enough; you must demonstrate a legal stake in the outcome.

Practical Steps to Challenge a Codicil

1. Obtain Specialist Legal Advice

Contentious probate disputes can be legally and factually complex. Early advice from a solicitor experienced in challenging wills and codicils will help you assess whether you have solid grounds to proceed, and what evidence may be necessary.

2. Review the Codicil and Related Documents

Examine the codicil alongside the original will and any previous codicils to understand what changes were made and whether they were properly referenced. A mis‑reference or ambiguous drafting can itself form part of the basis for a challenge.

3. Consider Lodging a Caveat

If the grant of probate (or letters of administration) has not yet been issued, you can lodge a caveat at the Probate Registry to temporarily prevent the grant. This buys time to investigate the validity of the codicil and preserve the estate's assets while you prepare your case.

4. Gather Evidence

Depending on your grounds, evidence may include:

• Witness statements regarding the circumstances of execution.
• Medical records about the testator's mental state at the time of signing.
• Drafts and correspondence relating to drafting instructions or discussions about the codicil.
• Solicitor's notes detailing how the codicil was explained and signed.
• Forensic analysis in cases involving alleged fraud or forgery.

Strong documentary and witness evidence is critical to overcoming the presumption that a codicil was validly executed and reflected the testator's intentions.

5. Issue Court Proceedings

If negotiations do not resolve the dispute, your solicitor can help you issue proceedings in the High Court (Chancery Division) or appropriate provincial division as part of a contentious probate claim. The proceedings will set out your legal bases (such as lack of capacity or undue influence) and the supporting evidence.

6. Attend Hearings and Present Evidence

Both sides will share documents and witness evidence. At the hearing, the judge will evaluate whether the codicil was legally valid and reflects the testator's free will and understanding.

Time Limits and Delay Considerations

There is no strict statutory time limit for challenging a will or codicil on grounds such as improper execution or lack of capacity. However, courts expect claimants to act promptly once they become aware of potential issues. Excessive delay can lead to a claim being dismissed under legal principles such as laches, where unreasonable delay prejudices the estate or other parties' interests. A recent High Court decision highlights that a significant delay in challenging a codicil can be fatal to the claim.

Acting early also helps preserve evidence and may allow you to enter a caveat before probate is granted.

Possible Outcomes

If the court finds that a codicil is invalid:

• The codicil may be set aside, meaning its amendments do not take effect.
• The original will and earlier codicils (if any) may instead govern the estate.
• If there is no valid earlier document, the estate may be administered under the intestacy rules.

The exact outcome depends on the specific circumstances and the terms affected by the codicil.

Risks and Practical Considerations

Emotional and Family Strain

Challenges to codicils often involve family relationships and can cause tension. Mediation or negotiation may sometimes resolve disputes without formal court proceedings.

Costs and Evidence Burden

Contentious probate litigation can be costly, especially where expert evidence is required. If a challenge is unsuccessful, claimants may be responsible for their own legal costs and potentially some costs of other parties.

Common Questions

Can a codicil be challenged if it was properly executed?
Yes. Even if a codicil meets formal execution requirements, it can be challenged on other grounds such as lack of capacity, undue influence, lack of knowledge and approval, fraud, or forgery.

Does an invalid codicil invalidate the main will?
If only the codicil is invalid, the original will (and any earlier codicils) remain valid unless they are separately challenged.

Is a codicil treated differently to a will in probate law?
In substance, codicils are subject to the same legal tests for validity as wills and are admitted to probate as part of the overall estate plan.

Key Takeaways

A codicil is a formal legal document that amends a will. It can be challenged in England and Wales if it does not comply with legal requirements, if the testator lacked capacity, was subject to undue influence, did not know and approve the changes, or if the codicil is fraudulent or forged. Challenging a codicil involves gathering evidence, potentially entering a caveat, issuing court proceedings, and presenting a clear case based on recognised legal grounds. Acting promptly, seeking specialist legal advice, and carefully preparing evidence are crucial steps to protect your interests and ensure the estate reflects the genuine intentions of the deceased.