Onsistent understanding of her affairs — indicated otherwise.
This decision reinforces a critical principle: capacity is fundamentally contextual, and the court is the final arbiter of whether it existed at the relevant time, regardless of medical certification.
The Significance of the LPA — and Its Limits
The LPA was introduced under the Mental Capacity Act 2008 to allow individuals with mental capacity to voluntarily appoint one or more persons (Donees) to make decisions on their behalf in the event they lose the ability to do so. It is a legal tool that preserves autonomy by ensuring that future decisions about personal welfare and property affairs reflect the Donor’s wishes. Unlike general Powers of Attorney, an LPA continues to be valid even after the Donor loses mental capacity, and only comes into effect at that point.
The robust statutory framework — from the presumption of capacity (Section 3(2) MCA), to the detailed requirements for assessing incapacity (Section 5(1)), is designed to balance personal liberty with necessary safeguards. As seen in XKF v XKG, however, the strength of this framework ultimately depends on its faithful and contextual application. The fact that
P was seen by a psychiatrist shortly before the LPA’s execution does not outweigh multiple other medical opinions that she lacked functional ability to understand or manage complex financial decisions.
This ruling also highlights the limitations of relying solely on isolated psychiatric assessments. The court made clear that a diagnosis such as Alzheimer’s does not automatically equate to incapacity. However, it placed weight on a longitudinal review of P’s condition — including evidence of her failing to cash rental cheques, her inability to manage income tax filings, and her unawareness of the legal implications of the SD she signed. Ultimately, capacity must be assessed not only clinically but functionally, in context and at the point of decision-making.
It is also worth noting that while procedural safeguards (such as witnessing by a Commissioner for Oaths) are important, they do not insulate an LPA from scrutiny. As the court noted, expert opinions assist in explaining the clinical impact of a condition, but the question of legal capacity is, in the end, one for the court.
Moving Forward with Clarity and Caution
The decision in XKF v XKG is currently under appeal. Until the appellate court issues its ruling, this case should be viewed not as a new legal standard, but as a strong reminder of the need for diligence when advising on or executing an LPA — particularly in situations involving elder donors with potentially deteriorating cognitive function. For estate planners, the case reinforces the importance of not treating the LPA as a mere formality. Instead, it must be approached with a full understanding of both the donor’s medical history and the potential risks of contested capacity. Estate planning is not just about distributing wealth, but about preserving intent and dignity. A properly structured and thoughtfully executed LPA remains a cornerstone of that effort — but only if all parties involved act with the care, attention, and foresight the law demands.
How can SMTP Help?
At SMTP, we view this case as a reaffirmation of the role lawyers must play in not just witnessing legal instruments, but in actively safeguarding client intent. We will recommend clients to seek the help of medical professionals to conduct thorough capacity assessments when there is any doubt, and we advise clients on implementing additional protective measures — including detailed documentation of mental state and family conferences to prevent future disputes. For clients with substantial assets or complex family structures, we also assist in drafting custom LPA Form 2 documents that provide tailored authority to Donees while reducing ambiguity.
We believe in close engagement with our clients, paying close attention to their individual facts and circumstances, and tailoring our advice and courses of action to cater to their specific needs and requirements. SMTP’s core philosophy is to provide bespoke legal advice based on our private clients’ specific needs and requirements, as cases always differ on their fine details. Our team of dedicated staff are ever eager and prepared to assist interested parties. Should you or your clients require any assistance in trust or real estate matters, please feel free to contact our Business Development Team to schedule a consultation. We look forward to working with you.
