Challenging the Validity of a Will

Not all wills are valid.

For example, a person who suffers from dementia may not have had capacity to make a will. In that case, even though the will is signed and witnessed, the Court may declare it to be invalid.

With an aging population, we have observed this problem to be occurring more often.

If you have a concern that your parent or loved one did not have the ability to make a will, or signed a will that did not reflect their true intentions, you may be able to make an application to challenge the validity of the will. In many cases, if successful, such a challenge will result in the Court granting probate over a previous will.

Such claims, however, can be both complicated and involve questions of medical evidence. At Eastwood Law, we have successfully litigated the number of such claims and are able to provide clear initial advice concerning the likely merits of such a claim.


Some of our notable cases include:

Attwell v Morgan [2019] WASC 182

West v Smith [2018] WASC 12

Cronan & Anor v Coates & Ors (No 2) [2024] WASC 184

Our Services

Eastwood Law has experience in acting in a range of jurisdictions in estate matters and related disputes, including the Supreme Court of Western Australia, the Court of Appeal (WA), the High Court of Australia and the State Administrative Tribunal.

We have advised and acted for clients based in other states of Australia as well as overseas.

Probate and Letters of Administration

When a person dies, the executor must usually obtain a grant of probate to execute the will. If no will exists, a grant of letters of administration is needed to distribute the estate.

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Challenging the Validity of a Will

You can challenge a will if you believe the maker lacked capacity or the will doesn’t reflect their true intentions. If successful, the Court may grant probate for a prior will.

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Executors Duties and Disputes

BBeing an executor is a significant responsibility, often requiring assistance to ensure the will is carried out and the estate is properly administered.

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Beneficiaries Concern Over Estate Administration

Beneficiaries can ensure they receive their entitlement by holding executors accountable, often through requests for the executor to “pass accounts” to the Court.

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Trust Disputes

Trusts are common in estate planning and family businesses. Understanding your rights as a beneficiary can often be confusing or challenging.

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Complex Estate Disputes

We handle estate disputes involving multiple issues, including will validity, constructive trust, and family provision claims, developing effective solutions for commercial outcomes.

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Why Choose Eastwood Law?

  • Boutique WA estate-litigation firm — we focus exclusively on contested estates, probate, family provision claims, will challenges and trust disputes.
  • Cameron Eastwood, Director — 20+ years of advising West Australian families through complex estate matters.
  • Supreme Court of WA + Court of Appeal experience — we appear at every level, including the High Court of Australia and the State Administrative Tribunal.
  • Trusted since 2005 — backed by hundreds of West Australian families who have walked through this with us.
  • Free 20-minute consultation — we will hear you out, give clear advice, and let you decide if we are the right fit.

Phone: (08) 9481 8460 · Office: Level 1, 26 Railway Road, Subiaco WA 6008

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Frequently Asked Questions

On what grounds can I challenge a will in WA?
A will can be challenged on grounds of: testamentary incapacity (the will-maker lacked the mental capacity to understand what they were doing), undue influence (the will was made under coercion), fraud or forgery, lack of knowledge and approval (the will-maker did not understand or approve the contents), or failure to comply with the formal requirements of the Wills Act 1970 (WA).
Who can challenge a will?
Any person with a legitimate interest can apply, including beneficiaries under an earlier will, persons entitled under intestacy if the will were set aside, executors of an earlier will, or family members financially affected by the disposition.
How do I prove lack of capacity?
Evidence typically includes medical records, witness statements about the will-maker’s behaviour and cognition around the time the will was made, the solicitor’s file notes, and expert medical opinion. The legal test is set by Banks v Goodfellow (1870) and applied by Australian courts.
How long does a will challenge take?
Straightforward matters resolve in 6-12 months via mediation. Contested trials can run 18-24 months. We focus on practical, cost-effective resolution where possible.
What is undue influence?
Undue influence is coercion or pressure that overbears the will-maker’s free will. It is more than persuasion or family pressure – the influence must be such that the will does not reflect the will-maker’s true wishes. Proving undue influence is difficult and requires careful evidence-gathering.
Can I challenge the will if I was a beneficiary in an earlier version?
Yes. If you were a beneficiary under a prior valid will and a later will (which removes or reduces your benefit) is invalid for any reason, the prior will may be revived. We can review the chain of wills and advise on the strength of your position.

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Our commitment to our clients means that achieving a positive result for you is our priority.