Last Updated on April 23, 2026 by tanya

Who Can Witness a Will?

 

About Our Legal Expert: This content is produced under the oversight of Michael Jefferies, First Personal Injury Director, who brings over 30 years of legal experience.

Written by Tanya Waterworth, Digital Content Writer

When You Can Challenge a Will Due to Witness Mistakes

Creating a Will is one of the most important steps in planning your estate and one of the key questions is: who can witness a Will? Essentially, a Will ensures your assets are distributed according to your wishes and reduces the likelihood of disputes among your loved ones. However, a Will is only legally valid if it meets certain requirements – including who can witness it.

Will are challenged under contentious probate law and there may be circumstances where it may be challenged if there are witness errors.

If you suspect there is a mistake with witnesses in a Will, it’s vital to act quickly. Our team at First Personal Injury works with a panel of lawyers highly experienced in contentious probate who can support you with care and understanding.

 

Who Can Witness a Will?

The rules for witnessing a Will are strict and legally binding. For a Will to be valid:

 

The person making the Will (the testator) must be over 18 years old.

The Will must be in writing.

The Will must be signed by the testator or by someone else on their behalf in their presence.

Two independent witnesses must be present at the same time to witness the signature. This means witnesses who have no personal interest in the Will.

 

Requirements for Will Witnesses

Witnesses must be:

 

• Over 18 years old – although this may change to 16 years old if the Wills Act 2025 comes into force.
• Capable of understanding what they are witnessing
• Independent — meaning they should not be beneficiaries of the Will or married to someone who benefits. If a beneficiary witnesses the Will, their gift may be considered void.

 

Why Witness Independence Matters

Independence is critical because the law assumes that a beneficiary acting as a witness could influence the testator. If a beneficiary witnesses a Will, they might lose the right to receive the gift under that Will. Courts can step in to invalidate gifts if there’s a perceived conflict of interest.

How Witnessing Works

When witnessing a Will:

 

1. The testator signs the Will in front of the witnesses.
2. The witnesses then sign the Will themselves, acknowledging that they saw the testator sign it.
3. Each witness must sign in the presence of the testator, though not necessarily in the presence of each other.

 

Failing to follow these rules can make the Will invalid or open to challenge, which is where contentious probate comes into play.

What is Contentious Probate?

Contentious probate refers to legal disputes over a Will after someone passes away. These disputes usually arise when:

 

• The validity of the Will is questioned.
• The distribution of assets is contested.
• There are allegations of undue influence, fraud, or mistakes.

 

Contentious probate can involve the courts and may become a complex, emotional process. Common issues include:

 

• Lack of testamentary capacity: Claiming the testator did not understand what they were doing.
• Undue influence: Arguing that someone pressured the testator.
• Witness mistakes: Errors in how the Will was signed or witnessed.

When Can You Challenge a Will Due to Witness Mistakes?

Witness mistakes are one of the most common grounds for challenging a Will. Some scenarios may include:

 

1. Witness is a beneficiary If a witness is also a beneficiary under the Will, their gift may be void. For instance, if your cousin witnesses your Will and is also left a sum of money, they might not legally receive it.

2. Improper signing If the testator or witnesses did not sign the Will in the correct order or in each other’s presence, the Will may be challenged.

3. Witness under 18 If one of the witnesses is under 18, their testimony may not hold in court, risking the Will’s validity.

4. Forgery or fraud If a signature is forged or the Will was manipulated during signing, this can invalidate the Will.

5. Failure to follow formalities Any other procedural mistakes, such as missing witness signatures or unclear dates, can form the basis for a challenge.

Example

Suppose John leaves a Will giving his estate to his niece, Emily. His friend Tom, who is also set to inherit a small sum, witnesses the Will. Because Tom is a beneficiary, his gift could be invalidated, or the entire Will could be open to challenge depending on the circumstances.

 

Steps to Take for a Contentious Probate Claim

Challenging a Will due to witness mistakes or other issues requires careful legal planning. Here’s a step-by-step approach:

 

1. Obtain Legal Advice

Contentious probate is complex. Engaging a specialist probate solicitor is essential. They can review the Will, assess witness involvement, and determine the strength of your claim.

 

2. Gather Evidence

Evidence is vita for proving witness errors. This can include:

• The original signed Will.
• Witness statements or affidavits.
• Medical records (if challenging capacity).
• Communication records showing potential undue influence.

 

3. Attempt Mediation

Some disputes may be resolved without going to court through negotiation or mediation. This approach can save time, reduce costs, and preserve family relationships.

 

4. File a Court Claim

If mediation fails, your solicitor can file a claim. This involves:

• Submitting a formal claim form.
• Providing supporting evidence.
• Attending hearings where witnesses may be cross-examined.

 

5. Await Court Decision

The court will consider all evidence, including:

• Witness credibility.
• Compliance with legal formalities.
• Testator’s intentions.

Tips for Avoiding Will Disputes

Preventing disputes is always better than dealing with contentious probate. Here are some practical tips:

 

• Use independent witnesses who are not beneficiaries.
• Ensure all witnesses understand their role.
• Keep clear records of the signing process.
• Consider professional legal advice when drafting the Will.
• Regularly update the Will to reflect changes in your life circumstances.

FAQs on Who Can Witness a Will

Can a beneficiary witness a Will?

It’s not advisable as it may invalidate their gift under the Will.

 

How many witnesses are required for a Will?

Two independent witnesses are required.

 

What is contentious probate?

Contentious probate is a legal dispute over a Will, often due to capacity, undue influence, or procedural mistakes.

 

Can I challenge a Will due to witness mistakes?

Yes, common grounds include beneficiaries acting as witnesses, improper signing, or underage witnesses.

Get Help Today

Witness errors, conflicts of interest, or procedural mistakes can all lead to contentious probate disputes. If you believe a Will may be invalid due to witness mistakes, the best course of action is to seek expert legal advice, gather evidence, and carefully consider your next steps.

Challenging a will can be emotional after the loss of a loved one. Our panel of contentious probate lawyers are highly experienced and also offer a range of fee structures, including ‘No Win, No Fee’ for certain cases along with other flexible funding – speak to our team to find out more.

Call us at 0333 358 2345 or contact us online for a free consultation.