Case Details
- Citation: [2025] SGHCF 66
- Title: XKG v XKF
- Court: High Court of the Republic of Singapore (Family Division), General Division
- District Court Appeal No: 2 of 2025
- Date of Judgment: 10 December 2025
- Judges: Teh Hwee Hwee J
- Hearing Dates: 11 July 2025; 5 November 2025
- Plaintiff/Applicant: XKG (Appellant; donee under the LPA)
- Defendant/Respondent: XKF (Respondent; P’s son)
- Legal Area: Mental Capacity — Capacity to execute a Lasting Power of Attorney
- Statutes Referenced: Mental Capacity Act 2008 (2020 Rev Ed) (“MCA”); references include “In proceedings under this Act” and the MCA’s LPA framework in Part 4 and the First Schedule
- Key Procedural Posture: Appeal from a District Judge’s decision that P lacked mental capacity to execute an LPA (and a Statutory Declaration)
- Length of Judgment: 49 pages; 14,679 words
- Core Issue on Appeal: Whether the mental capacity threshold for valid execution of an LPA was met at the material time
- Persons of Interest: “P” (donor); Appellant (P’s brother; first donee); Appellant’s son (replacement donee); Respondent (P’s son)
- Medical Context: Diagnosed dementia (moderate dementia) shortly before execution; psychiatric assessment by a consultant psychiatrist
- Outcome Sought Below (and in part on appeal): Declaration of lack of capacity; revocation of LPA; invalidation of Statutory Declaration (SD). On appeal, only LPA validity was contested.
Summary
XKG v XKF [2025] SGHCF 66 concerns the validity of a Lasting Power of Attorney (“LPA”) executed by an elderly donor (“P”) who was later found to lack the requisite mental capacity at the material time. The case sits squarely within the Mental Capacity Act 2008 (2020 Rev Ed) (“MCA”) framework, which seeks to balance two competing imperatives: protecting individuals who lack capacity, while preserving the autonomy of those who still retain it.
The Respondent, P’s son, applied for declarations that P lacked mental capacity when she executed an LPA and a Statutory Declaration, and sought revocation and invalidation. The District Judge (“DJ”) allowed the application, finding that P lacked capacity to execute both instruments. On appeal, the Appellant challenged only the LPA aspect. The High Court dismissed the appeal, holding that P lacked the ability to engage in the decision-making process for executing the LPA because she could not follow and/or process explanations about the nature, purpose, legal effect, scope, and consequences of the LPA.
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) was also in the United States. P’s only son, the Respondent, lived in Australia. The LPA at the centre of the dispute appointed the Appellant as the donee, with the Appellant’s son as the replacement donee.
The Respondent’s account was that P’s cognitive decline began as early as 2017. By 2020, the deterioration had progressed to the point that 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 describes how this decline manifested in P’s daily functioning: her home became unsanitary and cluttered; she required assistance with basic tasks such as locating misplaced items and her mobile phone; and she could become verbally and physically aggressive when frustrated.
In addition to behavioural and self-care issues, the Respondent pointed to concrete examples of impaired memory and executive functioning. These included an incident on 24 November 2022 where P, accompanied by others, opened a three-party joint account and transferred S$200,000, but later could not recall opening the account or making the transfer. The Respondent also alleged that P did not encash dividend cheques, could not file annual income tax returns, and was unable to discharge her 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 been neglected.
Shortly before the LPA was executed, 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 required full-time care and could not retain information after a few minutes or remember meals taken, and required assistance with basic tasks. The social worker’s view was that P lacked decision-making capacity for discharge and care plans. Although this position was later clarified in an email, the discharge summary dated 1 August 2023 recorded that P could not recall the fall, was unaware why she was admitted, and did not know which hospital she was in. P was then 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. The LPA Certificate was issued by Dr Fones Calvin Soon Leng, a consultant psychiatrist. The evidence showed that Dr Fones met the Appellant and the Appellant’s son on 15 August 2023 (the Appellant’s first return to Singapore in over a decade), and again on 22 August 2023 together with P. Dr Fones conducted a psychiatric assessment on 22 August 2023 and opined that P suffered from a major neurocognitive disorder, supported by her history of deteriorating memory, decision-making ability, and poor self-care.
What Were the Key Legal Issues?
The central legal issue was whether P had the mental capacity required to execute the LPA at the material time. Under the MCA’s LPA regime, capacity is not assessed in the abstract; it is assessed by reference to the specific decision to be made—here, the decision to execute an LPA conferring authority on donees to make decisions about P’s personal welfare and/or property and affairs when P later lacks capacity.
Because the appeal was limited to the LPA (not the Statutory Declaration), the court’s focus was on the decision-making process for executing the LPA: whether P could understand and process the relevant information, including the nature and purpose of an LPA, the legal effect of executing it, the scope of the powers being granted, and the implications and consequences of granting those powers.
A further issue, reflected in the judgment’s structure, was the role of evidence of cognitive impairment and functional deficits in determining capacity. The court had to consider how P’s dementia and observed memory problems affected her ability to engage with and retain information long enough to make the LPA decision, and whether the statutory safeguards and the assessment process were sufficient to establish capacity.
How Did the Court Analyse the Issues?
The High Court began by situating the case within the MCA’s “delicate balance” between protection and autonomy. The LPA framework is designed to allow individuals with capacity to plan for future incapacity. However, the court emphasised that the threshold for valid execution is demanding: it is not enough that a donor can communicate or appear agreeable to an arrangement. The donor must be able to engage in the decision-making process relevant to executing the LPA.
In analysing “information relevant to the decision to execute an LPA”, the court examined whether P could appreciate what an LPA was, how it related to her own circumstances, and what it would mean in practical terms once she lost capacity. The judgment indicates that P was unable to follow and/or process explanations given to her about the nature, purpose, and legal effect of the LPA. This included understanding the scope of the powers being granted to the donee and the limitations specified in the instrument.
The court’s reasoning also addressed the “decision-making process involved in executing an LPA”. This is a critical aspect of capacity analysis under the MCA: the inquiry is not merely whether the donor can state facts, but whether she can understand, retain, weigh, and use information relevant to the decision. The judgment found that P could not appreciate the nature of the LPA, could not understand how it related to her own circumstances, and could not grasp the consequences of executing it. In particular, the court held that P did not understand that the LPA would confer broad powers on the Appellant not only to take care of her and act in her best interests, but also to make binding decisions about her living arrangements, property, and finances once she lacked mental capacity.
The judgment further analysed “impairment of, or a disturbance in the functioning of, the mind or brain” and “ability to decide”. The evidence of moderate dementia diagnosed in July 2023, coupled with functional decline and memory impairment, supported the conclusion that P’s cognitive condition materially affected her capacity. The court considered P’s inability to recall significant assets and her inability to remember banking transactions and other responsibilities. It also considered the quality of P’s memory and how it impacted her ability to decide on the execution of the LPA.
Although the judgment extract provided is truncated, the overall structure indicates that the court relied on both medical and lay evidence. The psychiatric assessment by Dr Fones was part of the evidential matrix, but the court’s conclusion turned on whether P could actually process the relevant information at the time of execution. The court found that P could not grasp the consequences of executing the LPA, and therefore did not meet the MCA’s capacity threshold.
Finally, the court addressed “safeguards”. In LPA cases, safeguards are relevant to ensuring that the donor’s execution is informed and voluntary, and that the formalities are complied with. However, the court’s approach suggests that safeguards cannot cure a substantive lack of capacity. Even where an assessment is conducted and formal steps are taken, the court must still determine whether the donor had the requisite mental capacity to execute the LPA at the material time.
What Was the Outcome?
The High Court dismissed the appeal. The practical effect was that the LPA executed by P was held to be invalid because P lacked the mental capacity required to engage in the decision-making process for executing it. The DJ’s finding on lack of capacity therefore stood.
Because the appeal was limited to the LPA, the judgment’s outcome did not revisit the validity of the Statutory Declaration, which had been separately dealt with below. The decision confirms that, where capacity is not established, the LPA cannot operate to confer authority on donees.
Why Does This Case Matter?
XKG v XKF is significant for practitioners because it reinforces a core principle under the MCA: capacity to execute an LPA is decision-specific and process-oriented. The court’s emphasis on P’s inability to follow and/or process explanations about the LPA’s nature, purpose, legal effect, scope, and consequences illustrates that apparent agreement or general awareness is insufficient. The donor must be able to understand and grasp the practical implications of granting broad powers that become operative upon future incapacity.
For lawyers advising families, the case underscores the importance of contemporaneous evidence at the time of execution. Functional indicators—such as inability to recall significant assets, failure to manage financial responsibilities, and inability to retain information after short intervals—may strongly support a finding of incapacity. Practitioners should therefore treat medical diagnoses and observed cognitive deficits as highly relevant, but not merely as background facts; they must be linked to the donor’s ability to engage with the specific LPA decision.
The decision also has practical implications for the preparation and execution of LPAs. While formal safeguards and psychiatric assessments are essential, they do not replace the substantive inquiry into whether the donor can understand and process the relevant information. This case will likely be cited in future disputes about whether a donor met the MCA threshold, particularly where the evidence shows memory impairment and difficulty appreciating consequences.
Legislation Referenced
- Mental Capacity Act 2008 (2020 Rev Ed), Part 4 and the First Schedule (Lasting Powers of Attorney framework)
- Mental Capacity Act 2008 (2020 Rev Ed), s 11(1) (definition of LPA power to make decisions when the donor no longer has capacity)
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.