LEGAL GUIDE · ENGLAND & WALES

My Father Left Me Out of His Will – How Can I Fight This?

Discovering that your father has left you out of his will is one of the most painful things a person can go through. You are already grieving. And then comes the shock of being excluded in addition. 

The good news is that being left out of a will is not necessarily the end of the road. English law gives certain family members the right to challenge either the validity of the will itself, or to apply for reasonable financial provision from the estate even where the will is technically valid

First: Understand What You Are Actually Asking

Option 1 — Contesting the will itself. Arguing the will is legally invalid — lack of mental capacity, undue influence, improper execution. 

Option 2 — An Inheritance Act claim. Accepting the will is valid but arguing it fails to make reasonable financial provision for you under the 1975 Act.

These are separate legal claims. In some cases, both may be available. NJS Law will advise which route — or combination of routes — applies to your situation. 

Option 1: Contesting the Validity of Your Father's Will

Lack of Mental Capacity

A will is only valid if your father understood: what making a will means; the extent and nature of his estate; who had a claim on it; and the effect of the will he was making (Banks v Goodfellow [1870]). Where a will was made late in life, after a diagnosis, or during serious illness, medical records, GP notes and expert evidence can be central.

Undue Influence

A will can be challenged if someone pressured your father into making a will that did not reflect his true wishes. Evidence is typically circumstantial: unusual control over his affairs, isolation from family, or being the primary beneficiary despite a short or strained relationship.

Lack of Knowledge and Approval

Even if your father had capacity, a will can be challenged if he did not understand or approve the contents — for example, if it was drafted by someone else without proper explanation. 

Fraud or Forgery

Where a will has been forged, or where your father was deceived into signing a document he believed to be something other than a will, there are grounds to challenge its validity.

Failure to Meet Formal Requirements

A will must comply with the Wills Act 1837: in writing, signed by the testator, witnessed by two independent witnesses present at the time of signing. 

Option 2: An Inheritance Act Claim — Even If the Will Is Valid

Who Can Use the Inheritance Act?

Children — including adult children — are among the categories of person entitled to apply. The court will ask whether your father’s will fails to make reasonable financial provision for your maintenance. The focus is on your financial needs, not an equal share. 

When Are Adult Child Claims More Likely to Succeed?

  • You are in genuine financial need — limited income, housing insecurity, debts or health costs 
  • You have a disability or long-term health condition 
  • You were financially dependent on your father during his lifetime 
  • Your father made clear promises that you would inherit and you relied on those promises
  • You gave up career opportunities or provided care for your father 

Does Estrangement Kill the Claim?

Not automatically. The court looks at why the estrangement occurred. If your father was responsible for the breakdown — through abandonment, neglect or abuse — this can actually support your case.

⚠️ You must issue an Inheritance Act claim within six months of the grant of probate. Miss this deadline and courts rarely give second chances. 

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Frequently Asked Questions

Can I challenge my father's will if he deliberately left me out?

A deliberate exclusion does not prevent you from taking legal action. You may bring an Inheritance Act claim if the will fails to make reasonable financial provision for you. If you believe the exclusion resulted from undue influence or lack of capacity, there may also be grounds to contest the will itself.

You may still have a claim. The court considers both the surviving partner’s needs and your own — awards providing for both parties are common.

For an Inheritance Act claim, you must issue proceedings within six months of the grant of probate. For a will validity challenge, there is no fixed statutory deadline, but acting quickly is strongly advisable.

It becomes harder but may still be possible. The court can in certain circumstances treat distributed assets as part of the estate. It is important to act quickly before distribution occurs.

Most disputes settle through negotiation or mediation. NJS Law always seeks an early, cost-effective resolution.

This article is for general information only and does not constitute legal advice. For advice on your specific circumstances, please contact NJS Law directly.

For a full overview of personal injury claims, including eligibility, time limits and the claims process, see NJS Law’s will disputes service page.

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