Case Details
- Citation: [2025] SGHCF 66
- Title: XKG v XKF
- Court: High Court of the Republic of Singapore (General Division of the High Court, Family Division)
- Case Type: District Court Appeal No 2 of 2025
- Date of Judgment: 10 December 2025
- Dates Mentioned: 11 July 2025; 5 November 2025 (hearing dates); judgment reserved
- Judge: Teh Hwee Hwee J
- Pseudonymisation: “P” refers to the person whose mental capacity is assessed
- Plaintiff/Applicant: XKG (Appellant; donee under the LPA)
- Defendant/Respondent: XKF (Respondent; P’s son; applicant below seeking declarations and revocation)
- Legal Area: Mental Capacity — Capacity to execute
- Core Legal Instrument: Lasting Power of Attorney (“LPA”)
- Statutes Referenced: Mental Capacity Act 2008 (2020 Rev Ed) (“MCA”); First Schedule to the MCA; Part 4 of the MCA
- Specific Statutory Provision Mentioned: s 11(1) of the MCA
- Other Statutory/Procedural References (from extract): Family Justice Rules 2014 (Rule 670 referenced for written decision)
- Judgment Length: 49 pages; 14,679 words
- Outcome in High Court: Appeal dismissed (LPA execution found invalid due to lack of mental capacity)
- Key Medical Evidence (from extract): Diagnoses of dementia; psychiatric assessment by consultant psychiatrist (Dr Fones Calvin Soon Leng); MMSE performance referenced
- Key Factual Context (from extract): P executed an LPA appointing her brother as donee and her nephew as replacement donee; P’s son challenged validity
- Cases Cited (as provided): [2013] SGDC 149; [2019] SGHCF 15; [2021] SGFC 94; [2022] SGHCF 32; [2025] SGHCF 66
Summary
XKG v XKF concerned the validity of a Lasting Power of Attorney (“LPA”) executed by an elderly woman (“P”) shortly after she was diagnosed with moderate dementia. P’s son (“the Respondent”) applied for declarations that P lacked mental capacity when she executed both an LPA and a Statutory Declaration, and sought revocation of the LPA and invalidation of the Statutory Declaration. The District Judge (“DJ”) allowed the application and found that P lacked mental capacity at the material time. The brother named as donee under the LPA (“the Appellant”) appealed only against the DJ’s decision on the LPA’s validity.
The High Court (Teh Hwee Hwee J) dismissed the appeal. The court held that the mental capacity threshold for valid execution of the LPA was not met. In particular, the court found that P could not follow and/or process explanations about the nature, purpose, legal effect, scope, and implications of the LPA. The evidence showed that P could not appreciate what an LPA was, could not understand how it related to her own circumstances, and could not grasp the consequences of executing it—namely, that the Appellant would obtain broad powers to make binding decisions about P’s personal welfare and property and affairs once P lost capacity.
What Were the Facts of This Case?
P was an 87-year-old foreign national with permanent residency in Singapore. She had a brother, the Appellant, aged 91, who lived in the United States. The Appellant’s son (P’s nephew) also lived in the United States. P’s only son, the Respondent, lived in Australia. The LPA at issue appointed the Appellant as donee and the Appellant’s son as replacement donee. The Respondent challenged the LPA on the basis that P lacked the requisite mental capacity when she executed it.
The factual background described a progression of cognitive decline beginning around 2017. By 2020, P’s deterioration had progressed to the point where a geriatrician diagnosed her with dementia and prescribed daily medication. On 13 July 2023, the same geriatrician assessed P’s condition as having worsened to moderate dementia. The judgment also recorded functional impacts consistent with cognitive impairment: P’s home was described as unsanitary and cluttered, with pests; she required assistance with basic tasks such as locating misplaced items and her mobile phone; and she exhibited verbal and physical aggression when frustrated.
Beyond day-to-day functioning, the Respondent relied on examples of P’s inability to manage financial and administrative responsibilities. The judgment referred to an occasion on 24 November 2022 when P, accompanied by two individuals, opened a three-party joint account and transferred S$200,000 to it, but later could not recall opening the account or making the transfer. P also did not encash dividend cheques, could not file annual income tax returns, and was unable to discharge duties as sole shareholder and director of a company (“Company R”). Routine responsibilities such as responding to vehicle inspection notices and road tax reminders were also said to have gone unattended.
Shortly after the moderate dementia diagnosis, P suffered a fall and was hospitalised on 21 July 2023. On 25 July 2023, a senior medical social worker informed both parties that P needed full-time care. The social worker’s view was that P could not retain information after a few minutes, could not remember meals taken, and required assistance with basic tasks. The social worker also indicated that hospital doctors had assessed P as lacking decision-making capacity regarding discharge and care plans. P was transferred to a transitional care facility (“TCF”) on 2 August 2023. On or around 24 August 2023, P executed the LPA and a Statutory Declaration, with the LPA certificate issued by Dr Fones Calvin Soon Leng, a consultant psychiatrist.
In the period leading up to execution, Dr Fones met with the Appellant and the Appellant’s son on 15 August 2023, which was described as the Appellant’s first return to Singapore in over a decade. The Appellant and his son attended again on 22 August 2023 together with P. Dr Fones conducted a psychiatric assessment on that date and produced a medical report. The High Court’s reasoning (as reflected in the extract) emphasised that P’s cognitive impairment affected her ability to understand and process the explanation of the LPA’s nature, purpose, and legal effect.
What Were the Key Legal Issues?
The central issue was whether P had the mental capacity required to validly execute the LPA at the material time. Under the MCA framework, an LPA is a mechanism by which a person (“the donor”) confers authority on donees to make decisions about personal welfare and/or property and affairs when the donor no longer has capacity to make those decisions. The legal question in this case was not whether P had dementia in general, but whether she had sufficient capacity to engage in the decision-making process required for executing the LPA.
More specifically, the court had to determine whether P could understand and appreciate the relevant information about the LPA. This includes understanding what an LPA is, how it relates to her own circumstances, the scope of the powers being granted, and the implications of granting those powers—particularly that the donee could make binding decisions about P’s living arrangements, property, and finances once P loses mental capacity.
A further practical issue was the evidential assessment of capacity: the court had to evaluate medical evidence (including psychiatric assessment and cognitive testing such as the MMSE), functional evidence of P’s day-to-day abilities, and the content and quality of the explanations given to P in relation to the LPA. The High Court also had to consider the appeal posture: the Appellant challenged only the LPA aspect, not the Statutory Declaration.
How Did the Court Analyse the Issues?
The High Court began by situating the case within the “delicate balance” that the MCA seeks to achieve: protecting individuals who lack capacity while preserving autonomy for those who still retain it. The court emphasised that the LPA regime is designed to allow planning for future incapacity, but it is only effective if the donor meets the MCA’s capacity threshold at the time of execution. The judgment therefore focused on the mental capacity threshold for executing an LPA, rather than on later events.
In its analysis, the court treated the decision-making process as central. The extract indicates that the High Court found P lacked the requisite capacity because she was unable to follow and/or process explanations about the nature, purpose, and legal effect of the LPA, the scope of the powers she was granting, and the implications and limitations specified in the instrument. This approach aligns with the MCA’s conceptualisation of capacity as decision-specific and time-specific: the question is whether P can understand, retain, use, and weigh the relevant information for the particular decision.
The court’s reasoning also addressed impairment of the mind or brain and its impact on capacity. The evidence showed that P had been diagnosed with moderate dementia shortly more than a month before executing the LPA. The judgment described cognitive decline affecting memory, retention of information, and the ability to manage basic tasks and financial responsibilities. The court’s findings were supported by functional indicators: P could not recall significant banking transactions, could not file tax returns, and could not discharge corporate duties. These facts were relevant not as a substitute for legal capacity analysis, but as corroborative evidence of how P’s cognitive impairment manifested in practice.
Medical evidence played a significant role. The extract references P’s MMSE performance and her inability to recall significant assets. It also highlights that P could not grasp the consequences of executing an LPA. The High Court’s conclusion was that P could not appreciate what an LPA was, could not understand how it related to her own circumstances, and could not grasp the consequences of executing it—namely, that she was granting broad powers to the Appellant to make binding decisions about her, including regarding living arrangements, property, and finances, once she loses mental capacity. In other words, the court found a failure at the level of understanding and appreciation of the LPA’s legal effect.
The judgment further addressed safeguards. While the extract does not detail the safeguards section, the structure of the decision indicates that the court considered whether the process surrounding execution provided adequate protection. In LPA cases, safeguards often include the involvement of a certificate provider and the requirement that the donor be explained the nature and effect of the instrument. However, the High Court’s reasoning suggests that even where a psychiatrist provides certification and explanations are given, the legal question remains whether the donor actually has capacity to understand and process the relevant information. The court’s conclusion that P could not follow or process the explanation indicates that procedural safeguards could not cure substantive incapacity.
Finally, the High Court dismissed the appeal. The extract states that the court dismissed the appeal because it was satisfied that P lacked the requisite mental capacity to engage in the decision-making process for executing the LPA. The court’s reasoning therefore affirmed the DJ’s finding, and the High Court did not treat the Appellant’s arguments as displacing the evidence of incapacity at the material time.
What Was the Outcome?
The High Court dismissed the Appellant’s appeal. The practical effect was that the LPA was held invalid because P lacked the mental capacity required to execute it at the material time. As a result, the authority purportedly conferred on the Appellant (and replacement donee) under the LPA could not be relied upon.
Because the appeal was limited to the LPA (and did not concern the Statutory Declaration), the High Court’s decision preserved the DJ’s broader findings regarding the LPA while leaving intact the aspects not under appeal.
Why Does This Case Matter?
This decision is significant for practitioners because it illustrates how courts apply the MCA’s capacity threshold to the specific act of executing an LPA. The judgment underscores that capacity is not established merely by the presence of a diagnosis, nor by the fact that explanations were given. Instead, the court focuses on whether the donor can understand and appreciate the LPA’s nature, purpose, legal effect, scope of powers, and consequences—particularly the binding nature of decisions that the donee may make once capacity is lost.
For lawyers advising families and potential donors, the case highlights the evidential importance of demonstrating actual comprehension and appreciation at the time of execution. Medical assessments, cognitive testing, and observations of functional abilities can be highly relevant, but the legal analysis remains anchored in the donor’s ability to engage in the decision-making process for the LPA. Where the evidence shows inability to retain or process information, or inability to grasp consequences, courts may find that the MCA threshold is not met even if formal steps (such as certification) were taken.
From a precedent perspective, the case reinforces a consistent judicial theme in Singapore LPA litigation: the LPA is a powerful autonomy-preserving tool, but it is only valid when the donor has the requisite capacity. Practitioners should therefore treat LPA execution as a capacity-sensitive process requiring careful, contemporaneous assessment and documentation, especially where dementia or similar cognitive impairments are present.
Legislation Referenced
- Mental Capacity Act 2008 (2020 Rev Ed), Part 4
- Mental Capacity Act 2008 (2020 Rev Ed), First Schedule
- Mental Capacity Act 2008 (2020 Rev Ed), s 11(1)
- Family Justice Rules 2014 (Rule 670) (procedural reference in extract)
Cases Cited
- [2013] SGDC 149
- [2019] SGHCF 15
- [2021] SGFC 94
- [2022] SGHCF 32
- [2025] SGHCF 66
Source Documents
This article analyses [2025] SGHCF 66 for legal research and educational purposes. It does not constitute legal advice. Readers should consult the full judgment for the Court's complete reasoning.