How to Avoid Accidental Disinheritance

Written by Tanya Waterworth, Digital Content Writer

About Our Legal Expert: This content is produced with oversight by Michael Jefferies, Managing Director who has over 30 years’ legal experience.

Steps to Take If You Have Been Accidentally Disinherited

This issue is far more common than most people realise, so we look at how to avoid accidental disinheritance. It may be due to a simple oversight, an outdated Will, or a misunderstanding about how assets pass on death.

Unfortunately such errors can completely undermine someone’s intentions. When this happens, the fallout often leads to contentious probate claims in England and Wales.

So, if you are facing this situation, we partner with highly experienced contentious probate solicitors who can help. They offer a free, initial consultation – so contact our team today.

What Is Accidental Disinheritance?

Accidental disinheritance occurs when someone unintentionally excludes a person they meant to benefit from their estate. It usually happens because of:

• outdated Wills
• changes in family circumstances
• incorrect assumptions about how property passes
• failure to consider jointly owned assets
• reliance on verbal promises
• poor drafting or DIY Wills

In many cases, the person who made the Will had every intention of providing for a particular beneficiary, but the legal effect of their estate planning didn’t match their intentions.

Why Accidental Disinheritance Leads to Contentious Probate Claims

When someone is unexpectedly left out of an estate, disputes often follow. In England and Wales, contentious probate claims commonly arise because:

1. The Will no longer reflects the deceased’s intentions

If a Will is many years old, it may not account for new relationships, estrangements, deaths, or financial changes. Beneficiaries who believe the deceased intended to update their Will may challenge its validity or bring a claim under the Inheritance Act 1975.

2. The distribution of assets surprises or disadvantages someone

Unexpected outcomes often trigger suspicion. A beneficiary may believe:

• the Will was made under undue influence
• the deceased lacked mental capacity
• the Will was improperly executed
• someone interfered with the estate planning process

These concerns can lead to challenges to the Will’s validity.

 3. Joint assets pass outside the Will

Many people assume their Will controls everything they own. In reality, jointly owned property often passes automatically to the surviving co‑owner. This can unintentionally exclude children, relatives, or others who expected to inherit.

4. Verbal promises create expectations

If someone was told they would inherit a property or receive financial support, but the Will says otherwise, they may bring a proprietary estoppel claim. These cases often arise from informal assurances that were never formalised.

5. Dependants are left without reasonable financial provision

Under the 1975 Act, certain categories of people can claim if they were financially dependent on the deceased and the Will (or intestacy rules) fails to provide for them. Accidental disinheritance is a common trigger for these claims.

Common Causes of Accidental Disinheritance

Understanding how accidental disinheritance happens is the first step in preventing it. The most frequent causes include:

1. Failing to update a Will after major life events

Life changes quickly, and Wills need to keep pace. Accidental disinheritance often follows:

• marriage or civil partnership
• divorce or separation
• the birth of children or grandchildren
• the death of a beneficiary
• significant financial changes
• the sale or purchase of property

In England and Wales, marriage automatically revokes a Will unless it was made in contemplation of that marriage. Many people are unaware of this, which can lead to unintended outcomes.

2. Relying on the intestacy rules

If someone dies without a valid Will, the intestacy rules dictate who inherits. These rules are rigid and do not consider personal relationships, promises, or individual circumstances. Many people assume their estate will “naturally” pass to the right people, only to discover too late that the law says otherwise.

Misunderstanding how jointly owned property works

There are two types of joint ownership:

• Joint tenancy – the property passes automatically to the surviving owner
• Tenancy in common – each owner’s share passes under their Will

If someone intends to leave their share of a property to a particular beneficiary but owns it as a joint tenant, their intentions will not take effect.

3. Using vague or ambiguous wording in a Will

DIY Wills and poorly drafted clauses can create confusion. Ambiguity often leads to disputes about:

• which assets a gift refers to
• whether a beneficiary is still meant to inherit
• how to interpret unclear instructions

Ambiguity is one of the most common triggers for contentious probate claims.

4. Leaving everything to one person “to distribute as they see fit”

This approach is risky. The law treats such gifts as absolute unless the Will clearly creates a trust. If the chosen person does not distribute the assets as intended, other beneficiaries may be left with nothing.

How to Avoid Accidental Disinheritance

Preventing accidental disinheritance requires proactive planning. The following steps significantly reduce the risk of disputes.

Review your Will regularly

A Will should be reviewed:

• every two to three years
• after major life events
• when financial circumstances change
• when relationships shift

Regular reviews ensure your Will always reflects your current intentions.

Seek professional advice

A solicitor specialising in Wills and probate can:

• draft clear, legally sound documents
• identify risks you may not have considered
• ensure your estate plan aligns with your intentions
• advise on tax implications and asset protection

Professional drafting dramatically reduces the likelihood of disputes.

Understand how your assets pass on death

Make sure you know:

• which assets pass under your Will
• which pass by survivorship
• which have nominated beneficiaries (e.g., pensions, life insurance)
• how trusts or business interests are treated

A complete overview prevents gaps and unintended outcomes.

Keep records of your intentions

If you make decisions that could surprise someone, record your reasoning. A letter of wishes can help explain your choices and reduce the risk of challenges.

Avoid informal promises

If you intend to benefit someone, formalise it. Verbal assurances create expectations that can lead to litigation if they are not honoured.

Consider the needs of dependants

If someone relies on you financially, ensure your Will provides for them. This reduces the risk of claims under the 1975 Act.

What To Do Next

Accidental disinheritance is avoidable but if it has happened, it’s advisable to seek legal advice as early as possible. This is because legal time limits may apply and it becomes more difficult once assets from the estate are distributed.

Our panel of contentious probate solicitors offer a range of fee structures, including ‘No Win, No Fee’ for certain cases along with other flexible funding.

📞 Call us now at 0333 358 2345 or contact us online for your initial, no-obligation consultation.