Defending a Will Backed by a Capacity Assessment

The situation

Yusuf's mother lived alone in Huntsville until her mid-seventies, when early memory problems made that harder. Yusuf, a landscaper, moved his family — his wife Ines, who worked as a security guard, and their two young children — into her house to help with meals, appointments and the day-to-day slide that comes with early cognitive decline. His brother Paulo lived several hours away and visited a few times a year.

Years earlier, in 2015, their mother had signed a will splitting her estate evenly between her two sons. In 2023, with Yusuf and his family living with her full-time, she asked her lawyer to update it. The new will left her house — the bulk of the estate — and her savings to Yusuf, with a set amount to Paulo. She died the following year. Her estate, once the house and savings were added up, came to roughly $500,000: a house worth about $420,000 and savings of about $80,000.

When Paulo learned the terms of the 2023 will, he refused to sign the release the estate needed to distribute funds, and within a few months he had retained a lawyer to challenge the will's validity in the Superior Court. Yusuf, named as estate trustee, came to Treadstone Law to defend it.

The legal problem

A will challenge on the grounds of incapacity asks the court to find that the person who signed it did not, at that moment, understand what a will does, what property they had, or who might reasonably expect to benefit from it. Ontario law presumes a will is valid once it is shown to be properly signed and witnessed. But that presumption can be displaced if the challenger raises a genuine issue about the testator's capacity or about undue influence — pressure severe enough to overpower the testator's own judgment, as opposed to ordinary persuasion or family closeness.

Paulo's claim combined both theories. He argued that his mother's memory problems meant she could not have understood the change she was making, and that Yusuf, living in her home and managing her daily affairs, was positioned to influence a will that disinherited the son who was not there.

What made this case different from most capacity challenges was timing. Their mother's lawyer at the time had noticed the same memory concerns Yusuf described and, before preparing the new will, had arranged for her family doctor to assess and document her capacity specifically for the purpose of making a will. That assessment, dated weeks before the will was signed, recorded that she understood the extent of her property, could identify her two sons, and could explain — in her own words, quoted in the doctor's notes — why she wanted to leave the house to the son who had moved in to care for her. That contemporaneous record became the anchor of the defence, but it did not make the claim go away on its own. Undue influence does not require incapacity, and a challenger can still argue that even a capable person was pressured into a particular outcome.

The two theories also carry different burdens. Once a will challenger raises a genuine issue about capacity, the estate trustee defending the will generally has to prove the testator was capable when she signed it. Undue influence works differently: the person alleging it usually has to prove it happened, rather than the estate having to disprove it — though a family member who lived with an elderly parent and stood to inherit the bulk of the estate should still expect that dynamic to draw scrutiny.

What we did

1. Secured the full capacity file before anything else. We obtained the doctor's assessment notes, the drafting lawyer's file — including their attendance notes from the will-signing meeting — and their mother's medical records for the two years surrounding the will. Courts give weight to what a testator's own lawyer observed and recorded at the time, not just to a doctor's report, so the drafting file mattered as much as the medical one.
2. Had the assessment reviewed by a geriatric specialist. A written opinion is only as strong as its methodology. We asked an independent physician with expertise in testamentary capacity to review the original assessment and confirm it had tested the specific legal criteria for making a will, not just general memory function. The review supported the original finding.
3. Addressed the undue influence claim directly, not just the capacity claim. We gathered evidence — from the family doctor's notes, from a neighbour who visited regularly, and from the drafting lawyer's account of meeting with their mother alone, without Yusuf present — that she had raised the idea of changing the will herself and had been given the opportunity to speak to her lawyer privately about it.
4. Advised Yusuf on the cost and time reality early. We were clear that even a well-documented will does not guarantee an inexpensive or fast result. Estate litigation of this kind typically runs well over a year once examinations, expert reports and court scheduling are factored in, and legal costs on both sides are often paid out of the estate itself — shrinking what either brother ultimately receives regardless of who is right.
5. Proposed mediation before examinations began. With the medical and drafting evidence assembled and exchanged, we recommended testing a negotiated resolution before either side spent further months and estate funds on formal examinations for discovery. Paulo's lawyer agreed, in part because the capacity evidence weakened — though did not eliminate — the risk of proceeding to trial.

The outcome

Mediation produced a settlement, not a court ruling. The 2023 will's validity was never formally overturned, and Paulo agreed to withdraw the challenge — but only in exchange for a larger share than the will had given him. Under the original will, Paulo was set to receive about $50,000 out of the roughly $500,000 estate, with the house and remaining savings going to Yusuf. The negotiated settlement increased Paulo's share to about $150,000, funded by Yusuf taking on a mortgage against the house to make up the difference in cash rather than selling it.

That outcome reflected the real risk on both sides. Yusuf's evidence was genuinely strong — the capacity assessment, the independent medical review and the drafting lawyer's contemporaneous notes gave him a solid position at trial. But strong is not certain, and a trial carried real downside: a judge could still have found that memory problems documented elsewhere in the medical file created enough doubt to send the case sideways, and months of additional legal costs would have been paid from the same $500,000 both brothers were dividing. For Paulo, walking away from a claim with real evidentiary weaknesses in exchange for three times the amount the will had left him was a rational trade, even without admitting the will was invalid.

The process took about fourteen months from the challenge being filed to the settlement being finalized — faster than many estate disputes reach the trial stage, but far from the days-or-weeks timeline people sometimes expect from a documented, seemingly clear-cut case. Yusuf kept the house, though with a mortgage he had not planned on. The brothers' relationship, strained before the challenge began, did not fully recover; a negotiated settlement resolves the legal dispute, not the family one underneath it.

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