Information Centre · Contested Wills & TFM Claims
Medical Evidence in Testamentary Capacity Disputes
When a Will is challenged on capacity grounds, medical evidence can be highly influential. This article explains how medical records, specialist reports and contemporaneous evidence are considered in Victoria.
Medical assessments and contemporaneous evidence can be important in testamentary capacity disputes
Key points
- Testamentary capacity in Victoria is determined by the common-law test in Banks v Goodfellow (1870) LR 5 QB 549 — whether the will-maker understood the nature and effect of making a Will, the extent of the property being disposed of, the claims to which they ought to give effect, and was not subject to any disorder of the mind poisoning their affections, perverting their sense of right, or preventing the exercise of the natural faculties in the disposition.
- The propounder of a Will bears the ultimate burden of satisfying the Court of testamentary capacity; due execution and a Will regular on its face may support an inference or presumption of capacity, but where the evidence raises a real doubt the Court evaluates all the evidence (see Bailey v Bailey (1924) 34 CLR 558). Testamentary capacity is distinct from the separate knowledge-and-approval / suspicious-circumstances doctrine addressed in cases such as Nock v Austin (1918) 25 CLR 519.
- GP, hospital, specialist and neuropsychological records can be relevant evidence in a capacity dispute; the weight of any record depends on its purpose, timing, the clinician's opportunity to observe, reasoning, assumptions, consistency and how it sits with the whole evidence — a diagnosis or a cognitive score is not itself the testamentary-capacity test.
- Expert reports assist the Court by translating clinical evidence into a form relevant to the Banks v Goodfellow test; medical opinion is not a substitute for the legal test and does not bind the Court, and no category of evidence is automatically decisive.
- Solicitor file notes, drafting correspondence and observations recorded at the taking of instructions and on execution may be relevant; the so-called "Golden Rule" reflects prudent risk-management practice for solicitors, but its application is contextual and non-compliance does not itself invalidate a Will.
- Where the evidence conflicts, the Court weighs the medical material alongside the whole factual matrix — Will terms, relationships, instructions, execution circumstances and any circumstances of suspicion — before deciding whether the will-maker had capacity at the relevant time.
Disputes about whether a Will-maker had the legal capacity to make a Will are among the most fact-driven proceedings in Victorian estate litigation. The Court must look back — sometimes years — and reconstruct the Will-maker's understanding at the moment the document was signed. Medical evidence is often central to that exercise.
This article explains the role medical evidence plays in a testamentary capacity dispute, the types of records and opinions that may be relevant, why contemporaneous documentation matters, and how families and Will-makers can practically reduce the risk of a future dispute. It is general information only and is not legal advice.
Why Medical Evidence Matters
Where a Will is regular on its face and duly executed, testamentary capacity is presumed. That presumption can be displaced where the circumstances raise a real doubt about capacity, and in a contested case the onus of establishing capacity ultimately rests on the person propounding the Will (see Bailey v Bailey (1924) 34 CLR 558). Medical evidence, together with lay evidence, solicitor file notes and the surrounding circumstances, is often central to that inquiry.
Medical evidence can be significant because cognition is difficult to assess retrospectively. Lay witnesses can describe the Will-maker's behaviour and conversations, but may not be able to speak to the underlying neurological or psychiatric picture. Treating doctors and qualified experts can. The weight given to any particular record or opinion depends on the whole of the evidence before the Court.
Medical evidence is not, however, determinative on its own. Testamentary capacity is a legal test derived from Banks v Goodfellow (1870) LR 5 QB 549, not a medical diagnosis. A doctor can describe cognitive function and clinical findings, but the ultimate question — whether the Will-maker met the legal threshold at the moment of signing — is for the Court. Strong medical evidence on one side may not determine the case where the broader factual picture points the other way.
What Is Testamentary Capacity?
Testamentary capacity is the legal test for whether a person is mentally capable of making a valid Will. The classic formulation, from the 1870 English case of Banks v Goodfellow, continues to be applied in Victoria today. The Will-maker must understand the nature and effect of a Will, the extent of their property, the people who might reasonably expect to benefit, and must be free from any disorder of the mind that distorts their decisions.
For a fuller treatment, see our overview of testamentary capacity in Victoria, and the related article on challenging testamentary capacity. The remainder of this article focuses on the role medical evidence plays when capacity is in dispute.
Types of Medical Evidence Commonly Considered
A range of medical material can be relevant in a testamentary capacity dispute. Each type carries different weight depending on the timing, the qualifications of the author and the level of detail.
- GP records — the treating general practitioner often has the longest and most consistent relationship with the patient. GP notes can reveal patterns in cognition, medication, mood and behaviour over many years.
- Hospital records — admission notes, discharge summaries and nursing observations can document acute episodes of confusion, delirium or cognitive decline at specific points in time.
- Specialist reports — reports from neurologists, geriatricians and psychiatrists who have assessed the person clinically are often given significant weight, particularly when prepared close to the date of the Will.
- Geriatric assessments — comprehensive geriatric assessments examine cognition, function and social circumstances together. They can be especially useful when the Will-maker was an older person living with multiple conditions.
- Psychiatric assessments — relevant where mental illness, delusion or affective disorders may have influenced the Will-maker's judgment.
- Neuropsychological assessments — standardised cognitive testing carried out by a neuropsychologist can quantify deficits in memory, executive function and reasoning; a cognitive score is evidence to be considered, not itself the testamentary-capacity test.
No category of evidence is automatically decisive. The Court looks at the records as a whole, considering how they align with the timing of the Will and with the other evidence in the case.
Contemporaneous Medical Records
Timing is an important feature of medical evidence in a capacity dispute. Capacity is assessed at the time the Will is made. Records prepared close to that date can be directly relevant to what the Will-maker understood at the relevant time. The weight of any record depends on its purpose, the clinician's opportunity to observe, reasoning, assumptions and consistency with the other evidence.
For example, a GP note from around the time the Will was signed describing the person as alert, oriented and able to discuss financial matters may support an inference of capacity; a hospital admission for acute confusion around the same time may point the other way. Retrospective expert reports based on the file may still be relevant, but the Court will weigh how they engage with the contemporaneous material.
Practitioners advising older clients or clients with known cognitive conditions often record the date and circumstances of any capacity considerations in their file, which can assist the Court in evaluating the available evidence.
The Role of Expert Witnesses
In contested capacity proceedings, parties often engage independent medical experts to review the records and provide an opinion, having regard to the Banks v Goodfellow criteria, on whether the Will-maker met the legal test at the relevant time. These experts are often geriatricians, psychiatrists or neuropsychologists with experience in capacity assessments.
An expert witness owes a paramount duty to the Court and not to the party paying their fees. Their role is to assist the Court by explaining the medical material, identifying what the records do and do not support, and offering a considered opinion having regard to the legal test. They are not advocates.
Expert evidence assists the Court but is not a substitute for the legal test. The Court remains the ultimate decision maker on capacity, and weighs expert opinions alongside the contemporaneous records, solicitor file material and any lay evidence.
What Happens If Medical Evidence Is Conflicting?
Conflict between medical opinions can arise in capacity disputes. One expert may consider the records consistent with capacity at the relevant time; another may reach the opposite view on the same material. The Court is then required to weigh the opinions and the underlying evidence.
In doing so, the Court considers matters such as the qualifications and experience of each expert, the methodology used, the assumptions made about the records, and how the opinions sit alongside the broader factual circumstances. Lay evidence about the Will-maker's behaviour, conversations and apparent understanding may also be relevant.
The terms of the Will itself can form part of the broader factual matrix. A Will that is rational on its face and reflects a considered plan may be evaluated differently from one that departs sharply from previous arrangements without explanation; either way, capacity is decided on the whole evidence.
Are Solicitor File Notes Also Important?
Solicitor file notes may be relevant evidence. The solicitor who prepared the Will is often the professional who was present when instructions were given and when the Will was executed. Detailed file notes can therefore assist the Court, depending on their content, timing and consistency with the other evidence.
- Attendance notes recording the date, time, location, those present and the substance of the discussion provide a contemporaneous account of the Will-maker's engagement and understanding.
- Capacity assessments by the solicitor — the questions asked, the answers given and the solicitor's observations — show how the issue was addressed at the time, not reconstructed later.
- Instructions recorded in the Will-maker's own words help demonstrate that the Will reflects considered choices rather than confusion or the prompting of others.
- Execution process — notes about how the Will was read, explained, witnessed and signed help establish that proper procedure was followed.
Absence of a contemporaneous file note may reduce the contemporaneous information available. Its significance depends on the whole of the evidence. Where capacity may be in issue, careful notes may assist later evaluation.
Dementia, Cognitive Decline and Medical Evidence
A dispute may involve a Will-maker who had been diagnosed with dementia or showed signs of cognitive decline. The mere existence of a diagnosis does not decide the question — see our article on whether a person with dementia make a valid Will in Victoria. What matters is whether, at the time of signing, the Will-maker met the legal test.
In such cases, medical evidence may address the stage and progression of the condition, the Will-maker's functional cognition around the relevant date, and any documented fluctuations in capacity. "Sundowning", lucid intervals and the impact of medication may be relevant in the medical material.
Practical Steps for Families and Will-Makers
Where capacity may be a live issue — now or in the future — the following practical steps can significantly strengthen the position of the Will-maker and reduce the risk of a contested estate:
- Act early — make or update the Will while capacity is clear, rather than waiting until a diagnosis or decline forces the issue.
- Use an experienced solicitor — engage a practitioner who routinely advises older clients and is familiar with capacity, undue influence and the dynamics of contested estates, including Wills and estate planning for older Victorians.
- Obtain a contemporaneous medical opinion — where there is any real doubt, ask the GP or treating specialist to assess and record capacity at or about the time the Will is prepared. The so-called "Golden Rule" reflects prudent practice for solicitors dealing with an aged or unwell will-maker, but non-compliance does not, of itself, invalidate a Will.
- Keep detailed records — both medical and legal. The Will-maker's GP should be asked to make full notes; the solicitor should record the instructions, the capacity assessment and the execution process in detail.
- See the Will-maker alone — instructions should be taken without family members or proposed beneficiaries present, so the solicitor can be confident the wishes are the Will-maker's own.
- Preserve the records — medical and legal records relating to a Will should be kept securely. They may need to be produced years later if a dispute arises.
- Get advice early if a dispute looms — whether you are an executor, a concerned family member or someone considering a challenge, early advice helps clarify the strength of the available evidence and the practical options. Issues relating to probate and estate administration and a possible capacity challenge often need to be considered together.
Conclusion
Medical evidence is one of the most important — and one of the most contested — features of a testamentary capacity dispute in Victoria. Contemporaneous records, considered specialist opinions and detailed solicitor file notes can together create a strong evidentiary picture of the Will-maker's understanding at the moment the Will was signed.
Equally, medical evidence is not the end of the inquiry. Testamentary capacity is a legal test, and the Court weighs the medical material against the broader factual circumstances of the case. For families, Will-makers and executors, the best protection is careful planning, experienced advice and good records — long before any dispute arises.
Where the validity of a Will may be questioned on capacity grounds, or where a Will is being prepared in circumstances in which capacity may later be raised, obtaining legal advice early can assist those involved to understand their position.
Frequently Asked Questions
Why is medical evidence relevant in testamentary capacity disputes?
Testamentary capacity is assessed by reference to the Will-maker's understanding at the time the Will was made, applying the test in Banks v Goodfellow (1870) LR 5 QB 549. Contemporaneous clinical records and expert assessments can help the Court reconstruct that understanding, but the weight of any medical evidence depends on its purpose, timing, the clinician's opportunity to observe, reasoning, assumptions, consistency and how it sits with the whole evidence.
Are GP records relevant?
GP records can be relevant, particularly where entries around the time the instructions were given or the Will was made record cognition, mood, medication or behaviour. A diagnosis or a cognitive-screening score is not itself the testamentary-capacity test, and GP records are considered alongside the whole evidence.
Can dementia records be used in a Will challenge?
Yes. Records relating to dementia, cognitive decline or other neurological conditions may be relied upon in capacity disputes. A diagnosis does not, of itself, prove absence of testamentary capacity. The Court considers what the records reveal about the Will-maker's functional understanding of the relevant matters at the relevant time — not simply the label of the condition.
What happens if medical experts disagree?
Where experts disagree, the Court weighs each opinion against the underlying records, the expert's qualifications and methodology, the assumptions relied upon, and the broader factual matrix — including solicitor file notes, the Will-maker's conduct at the relevant time and the terms of the Will itself. No single expert opinion is automatically preferred.
Are solicitor file notes important?
Solicitor file notes recording the questions asked, the instructions received and observations of the Will-maker's apparent understanding may be relevant evidence and can be significant depending on their content, timing and consistency with the other evidence. The so-called "Golden Rule" reflects prudent risk-management practice for solicitors and is contextual; non-compliance does not, of itself, invalidate a Will.
Contested Wills & TFM Claims
Concerned about capacity and a contested Will in Victoria?
Parke Lawyers advises executors, beneficiaries and Will-makers on testamentary capacity, medical evidence and disputes over Wills in Victorian estates. Early advice helps protect a loved one's wishes and reduce the risk of contested proceedings.
This article is general information only and does not constitute legal advice. Please obtain advice tailored to your circumstances.