This article provides general information only and does not constitute legal or religious advice. Readers should seek tailored advice from a qualified New South Wales lawyer and their Imam or religious adviser before taking action.
Introduction
Creating an Islamic will in New South Wales (NSW) is a crucial aspect of estate planning for those wishing to adhere to their faith. For any will to be legally binding under Australian law, however, the person making it must possess the required mental ability, a standard known as testamentary capacity. This legal requirement becomes particularly complex when the testator has a condition like dementia, which can create uncertainty about their capacity and lead to a dispute over the will’s validity.
This guide examines the critical intersection of Islamic inheritance principles and NSW succession law. It provides essential information on how testamentary capacity is determined, the impact of dementia on making a valid will, and the legal standards that must be met to ensure an Islamic will is upheld. Understanding these requirements is crucial for protecting a testator’s wishes and preventing a will from being challenged on the grounds of incapacity.
Interactive Tool: Check If You Can Legally Make a Valid Islamic Will
NSW Islamic Will Testamentary Capacity Checker
Quickly check if you (or a loved one) are likely to meet the legal requirements for making a valid Islamic will in NSW, especially where dementia or mental health is a concern.
Has the person making the will been diagnosed with a mental health condition (e.g., dementia, bipolar disorder, schizophrenia)?
At the time of making the will, did the person understand the nature and effect of creating a will?
Did the person have a general understanding of their assets and the people who might reasonably expect to benefit from their estate?
Was a medical assessment of testamentary capacity obtained around the time the will was signed?
✅ Testamentary Capacity Likely Satisfied
- Banks v Goodfellow (1870) LR 5 QB 549
- Estate Rofe [2021] NSWSC 1125
⚠️ Risk: Capacity May Be Challenged
- Banks v Goodfellow (1870) LR 5 QB 549
- Omari v Omari [2022] ACTSC 120
❌ Testamentary Capacity Likely Not Met
- Omari v Omari [2022] ACTSC 120
- Section 7 of the Administration and Probate Act 1929 (ACT)
⚖️ No Medical Evidence: Increased Dispute Risk
- Estate Rofe [2021] NSWSC 1125
This tool provides general information only and does not constitute legal advice. Results are indicative only and depend on individual circumstances. For advice specific to your situation, Contact LawBridge’s Islamic Wills and Estate Lawyers.
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Understanding Testamentary Capacity in NSW
The Legal Standard for Making a Valid Will
Testamentary capacity is the legal term for the mental ability required to make a valid will. Ultimately, this concept ensures that the person making the will, known as the testator, has a rational understanding of their actions and intentions.
In NSW, as in the rest of Australia, a testator is presumed to have testamentary capacity unless it is proven otherwise.
Consequently, the responsibility to prove a lack of capacity falls on the person challenging the will.
To be considered capable, the testator must understand several key elements at the time of making their will, which include:
- The nature and effect of creating a will.
- The assets and property they own that will form their estate.
- The people, such as family members or dependants, who might reasonably expect to benefit from their estate.
The Banks v Goodfellow Test Explained
The Supreme Court of NSW applies a specific test to assess testamentary capacity, which is based on the British case of Banks v Goodfellow [1870] LR 5 QB 549. This standard determines whether a testator was of sound mind when they executed their will.
Interestingly, a will can be valid even if the testator suffered from a mental disorder, provided they met the requirements of this four-part test.
Specifically, the court examines whether the testator could:
- Appreciate the effect of making a will, meaning the individual must have understood that they were creating a document that would distribute their property after their death.
- Recall the assets of their estate, where the testator needed to have a general knowledge of the property and assets they were giving away.
- Comprehend the claims of potential beneficiaries, which involves understanding that certain people, typically close family, have a moral claim on the estate and appreciating the significance of including or excluding them.
- Be free from any disorder affecting rational decisions, ensuring the testator was not influenced by any mental disorder or delusion that would prevent them from making rational choices about how to distribute their estate.
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Mental Health Conditions & Testamentary Capacity
How Dementia & Other Conditions Can Affect Capacity
A diagnosis of a mental health condition such as dementia, bipolar disorder, or schizophrenia does not automatically mean a person lacks the testamentary capacity to make a valid will. The central legal question is not the diagnosis itself, but whether the condition significantly impaired the person’s understanding and judgment at the time they signed their will.
The legal threshold for proving a lack of testamentary capacity is high, meaning that:
- Conditions like dementia or other psychiatric and neurological disorders may affect a person’s mental faculties, but this may not be severe enough to prove they lack capacity.
- The court ultimately assesses the functional impact of the illness on the individual’s ability to reason and make decisions about their estate planning.
For instance, a will can be considered valid even if the testator suffers from a mental disorder, as long as they can still satisfy the legal test for capacity. As seen in the NSW case of Estate Rofe, cognitive impairment resulting from dementia does not necessarily negate testamentary capacity.
The Role of Medical Assessments in Determining Capacity
When there are concerns about a person’s mental state due to age, illness, or disability, obtaining a medical assessment of their cognitive abilities can be a crucial step. A qualified medical professional, such as a geriatrician, psychiatrist, or general practitioner, can provide an opinion on whether the person has testamentary capacity.
This assessment is particularly valuable if the will is later challenged in court on the grounds of incapacity. Specifically, obtaining this evaluation offers several key benefits:
- A formal medical evaluation conducted around the time the will is executed serves as strong evidence of the testator’s mental state.
- The physician’s report can be stored with the will and later used as a sworn affidavit in court proceedings, helping to confirm the testator’s fitness to make a will.
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Ensuring Your Islamic Will is Valid Under Australian Law
Meeting General Requirements for a Will in NSW
An Islamic will can be legally valid in Australia, yet it must still comply with the same formalities as any other will. For a will to be recognised as valid in NSW, it must meet strict rules designed to ensure the document truly reflects the testator’s intentions.
To be legally binding, your will must meet the following conditions:
- It must be in writing: the will needs to be a physical document, not just a verbal agreement.
- It must be signed by the testator: your signature confirms approval of its contents.
- It must be witnessed correctly: two independent adult witnesses must see you sign (or acknowledge your signature) and then sign in your presence.
- You must have testamentary capacity: you must be of sound mind, memory and understanding when making the will.
- It must be made voluntarily: the will cannot result from coercion, duress or undue pressure.
Proactively Establishing Your Testamentary Capacity
Engaging a solicitor to assist with your wills and estate planning is a crucial first step. Solicitors are trained to identify signs of diminished capacity and will refuse instructions if they doubt a person’s ability to make rational decisions. A professionally prepared will therefore strengthens the presumption that you possessed the required capacity.
Where age, illness or a medical diagnosis raises questions about capacity, you can bolster the will’s validity by obtaining a medical assessment. A qualified geriatrician or psychiatrist can provide a mental evaluation on or near the signing date, and the resulting report can travel with the will as evidence of fitness.
To safeguard your will against future challenges, consider the following measures:
- Instruct an experienced solicitor who can document the process and confirm your understanding of the will’s terms.
- Secure a contemporaneous medical report and store it with the executed will so it is available if a dispute arises.
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Disputing a Will Due to Lack of Testamentary Capacity
Who Can Dispute a Will in NSW
In NSW, not just anyone can raise a dispute over a will based on a lack of testamentary capacity.
Instead, the right to legally challenge a will is restricted to individuals defined as an “eligible person.” This restriction ensures that only those with a legitimate interest in the estate can initiate court proceedings.
An eligible person typically includes:
- Beneficiaries named in the current will being challenged.
- Beneficiaries named in a previous will of the testator.
- Individuals who would be entitled to inherit the estate under intestacy laws if the will were declared invalid.
The Process for Challenging a Will
The first step for an eligible person intending to dispute a will on the grounds of testamentary incapacity is to file a probate caveat with the Supreme Court of NSW.
This legal notice prevents the court from issuing a grant of probate, which validates the will. Therefore, it is crucial to act quickly before the grant is made.
Once filed, a caveat remains in effect for six months from its filing date.
There are several reasons for filing a caveat, including concerns that the will is a forgery, was executed under undue pressure, or that the testator lacked the required testamentary capacity.
Once a challenge is initiated, the court will carefully assess the evidence presented by both sides.
If the dispute proceeds, the court will generally take one of the following actions:
- Dismiss the challenge and approve the will for probate.
- Revoke the will entirely.
If a will is revoked, the court may then probate a previous valid will.
However, if no earlier valid will exists, the estate is distributed according to the rules of intestacy.
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Case Study: The Estate of Mariem Omari
A Will Challenge Based on Dementia & Testamentary Incapacity
The Australian Capital Territory (ACT) Supreme Court case of Mohamed Omari and Mustapha Omari v Fatma Omari [2012] ACTSC 33 provides a clear example of the legal process for challenging an Islamic will. The case involved the will of Mariem Omari, a non-English speaking Muslim migrant who was also illiterate.
She executed her will, which was based on a precedent for Muslims, by making a thumbprint on each page. The will distributed her estate among her eight children according to Islamic inheritance principles, specifically:
- Providing each son with a full share.
- Providing each daughter with a half share.
Following her death, one of her daughters lodged a caveat to prevent probate, initiating a dispute over the will’s validity. The basis of the challenge was the claim that Mrs. Omari was suffering from dementia when the will was made and therefore lacked the required testamentary capacity.
The Court’s Decision & Its Implications for Islamic Wills
The court applied the common law test from Banks v Goodfellow to determine if Mariem Omari had the necessary testamentary capacity. Despite evidence from a local imam confirming that the will’s distribution aligned with Islamic expectations, medical testimony established that the testator’s diagnosed dementia meant she did not possess the requisite capacity when the will was executed.
As a result, the court found the will to be invalid. This decision meant that Mrs. Omari’s estate could not be distributed according to her religious intentions.
Instead, the court appointed the Public Trustee to administer the estate according to the intestacy provisions of the Administration and Probate Act 1929 (ACT). Consequently, this led to the following outcomes:
- The estate was distributed equally among her children.
- The result was directly contrary to the terms of her Islamic will.
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Conclusion
Determining testamentary capacity is essential for creating a valid Islamic will in NSW, particularly when a testator is affected by a condition like dementia. If a will is successfully disputed due to a lack of capacity, the estate is distributed according to Australian law, which may not align with the testator’s religious intentions.
To ensure your estate planning reflects both your faith and the legal requirements in NSW, seeking specialised guidance is crucial. Contact our experienced Islamic wills and estate lawyers at LawBridge for trusted expertise to help secure your wishes and protect your family’s future.
Frequently Asked Questions
Testamentary capacity is the legal term for the mental ability required to make a valid will. It ensures the person making the will understands the nature of the document, the extent of their property, and the claims of those who might reasonably expect to benefit from their estate.
No, a diagnosis of dementia does not automatically mean you lack the testamentary capacity to make a valid will. The crucial legal question is whether the condition significantly impaired your understanding and judgment at the specific time you signed the will.
Courts in NSW use a legal standard from the case of Banks v Goodfellow to assess testamentary capacity. This test examines whether the person understood the effect of making a will, could recall their assets, comprehended the claims of potential beneficiaries, and was free from any mental disorder affecting their rational decision-making.
You can help establish your testamentary capacity by having a solicitor draft your will and by obtaining a medical assessment of your cognitive abilities from a qualified professional. A solicitor’s involvement strengthens the presumption of capacity, while a medical report provides crucial evidence of your mental state.
In NSW, only an “eligible person” has the legal right to challenge a will for lack of testamentary capacity. This group is generally limited to beneficiaries named in the current or a previous will, and individuals who would inherit under intestacy laws if the will were invalid.
If a will is successfully challenged for lack of capacity, the court will declare it invalid and revoke it. The court may then approve a previous valid will, but if one does not exist, the estate will be distributed according to the rules of intestacy.
Yes, an Islamic will can be legally valid in Australia, provided it meets the same formal requirements as any other will. To be legally binding, it must be in writing, signed by you, and witnessed by two independent adults in your presence.
It is important because solicitors are trained to identify signs of diminished capacity and will refuse to take instructions if they doubt a person’s ability to make rational decisions. A professionally drafted will therefore strengthens the legal presumption that you possessed the necessary testamentary capacity.
A probate caveat is a legal notice filed with the Supreme Court to prevent a grant of probate from being issued for a will. It is used by an eligible person to signal their intention to challenge the validity of the will on grounds such as forgery, undue influence, or lack of testamentary capacity.








