A person who lacks the mental capacity to conduct court proceedings cannot file, defend or settle a divorce on their own. They can still be a party to one. Singapore procedure handles this by requiring that they act through a litigation representative, a person appointed by the court to conduct the case on their behalf. You may also see the older terms next friend and guardian ad litem, which describe the same role.
The substantive law does not change. The ground for divorce, the six facts, the approach to dividing assets and the maintenance factors are all the same as in any other case. What changes is who gives instructions, how the court supervises the outcome, and how much weight the ancillary matters have to carry, because the arrangement reached will often have to fund care for years.
Capacity is decision-specific, not a global label
Under the Mental Capacity Act 2008, a person lacks capacity in relation to a matter if, at the material time, they are unable to make a decision for themselves because of an impairment of, or disturbance in the functioning of, the mind or brain. The test looks at whether the person can understand the relevant information, retain it long enough to make the decision, use and weigh it, and communicate their decision.
Two features of that test matter here. It is decision-specific: someone may be able to decide what to eat and where to live but not able to run litigation about the division of a property portfolio. And it is time-specific: capacity can fluctuate, and the question is capacity at the time the decision has to be made. There is also a statutory presumption of capacity: a person is assumed to have it until the contrary is shown, and an unwise decision is not evidence of incapacity.
In practice a medical opinion is needed, from a doctor who has actually assessed the person, addressed to the specific question of whether they can conduct these proceedings. The mechanics are set out in the guide to how mental capacity is assessed in Singapore. A general statement that someone has dementia or a psychiatric diagnosis will not do the job; plenty of people with both conditions retain capacity to litigate.
The litigation representative: who can act
A litigation representative conducts the proceedings in the interests of the person who lacks capacity. They give instructions to the lawyer, sign documents, make decisions about settlement, and take on responsibility for the conduct of the case.
The court will normally want someone who:
- Has no conflicting interest in the outcome of the proceedings.
- Can fairly and competently conduct the case, which usually means being able to understand the issues and take advice.
- Knows the person well enough to have a real sense of their interests, wishes and circumstances.
- Is willing to act, and to accept the responsibilities that come with it.
Usually this is a family member: an adult child, a sibling, a parent. Where no relative is willing or suitable, the court can appoint another suitable person, and the Public Guardian may be involved where there is genuinely nobody else available. This is not something to leave until the hearing. If there is no obvious candidate, flag it at the outset, because the proceedings cannot progress properly without one.
The conflict problem nobody plans for
The most common practical difficulty is that the person best placed to act is closely connected to the other spouse. A daughter who wants to protect her incapacitated mother may also be under pressure from her father, who is the other party. A brother-in-law may be financially entangled with both households.
This is not a technicality. The litigation representative is being asked to fight, if necessary, against a member of their own family over money that may be the incapacitated person’s only source of long-term care funding. Where the conflict is real, it is better to acknowledge it and find someone else, whether a more distant relative, a family friend, or an independent person, than to appoint someone who cannot realistically take an adverse position. A settlement reached by a compromised representative is exactly the kind of arrangement the court will look at hardest.
How this interacts with deputyship and LPAs
If the person already has a deputy appointed by the court, or a donee under a Lasting Power of Attorney made while they had capacity, there is a structure in place. But the roles are distinct and it is worth being precise about the difference.
| Deputy or LPA donee | Litigation representative | |
|---|---|---|
| Source of authority | Court order under the Mental Capacity Act, or a registered LPA made in advance | Appointment by the court hearing the divorce proceedings |
| Scope | Personal welfare and/or property and affairs, as defined in the order or instrument | Conduct of these particular proceedings |
| Typical duration | Ongoing, often for the rest of the person’s life | Ends with the proceedings |
| Who supervises | Office of the Public Guardian | The court, through the proceedings themselves |
An existing deputy or donee is usually the natural candidate, and appointing them avoids duplicating oversight. But authority to manage someone’s bank accounts is not the same as authority to conduct a divorce, and the court will still make the appointment. The background on both structures is in the guides to deputyship in Singapore and the Lasting Power of Attorney.
One awkward scenario recurs: the LPA donee is the other spouse. Someone who made an LPA in favour of their husband or wife years ago, and now needs to divorce them, is in an obvious difficulty. The donee cannot sensibly act on both sides. Where this arises, it should be raised immediately, and the LPA position may need to be dealt with separately; the note on challenging an LPA or a deputy covers the routes available.
What actually happens in the proceedings
The steps are those of any Singapore divorce: an Originating Application, service, interim judgment, then ancillary matters, then final judgment. The divorce process guide sets out the sequence. The differences are these.
The appointment of the litigation representative has to be dealt with before the case can move forward, supported by the medical evidence and by the proposed representative’s own confirmation that they are willing to act and have no conflict. Documents are served on and signed by the representative. Where the incapacitated spouse cannot swear an affidavit, evidence about the marriage and the household often has to be assembled from other sources: medical records, family members, financial documents.
Timelines usually stretch. Obtaining a capacity assessment, identifying a representative, and getting the appointment in place all take time before the substantive dispute even starts. Build that into your expectations rather than treating it as a delay.
The court scrutinises the settlement
In an ordinary divorce, if both sides agree the ancillary matters, the court will generally record the agreement without probing it hard. That changes where one party lacks capacity.
The court is being asked to approve terms agreed by someone acting for a person who cannot check the deal for themselves, against a counterparty who has every incentive to keep costs down. So it looks harder. Expect questions about whether the housing arrangement actually works for someone with care needs, whether the maintenance figure reflects the real cost of care over time, and whether the asset split leaves enough to fund that care once any current arrangement ends.
Practically, that means a settlement in these cases should come with a worked explanation attached, not just the figures, but why they are adequate. A representative who can show the reasoning is in a far better position than one who simply presents an agreed number.
The ancillary matters carry more weight than usual
For most divorcing couples, the ancillary outcome is a starting point for a new financial life. For a spouse who lacks capacity, it may be close to the whole of it, because there is little prospect of future earnings changing the picture.
On assets, the s 112 exercise is unchanged, but the practical case for a larger share is often stronger: the guide to division of matrimonial assets explains the structured approach the court takes. Housing needs work carefully. Whether the matrimonial home should be retained, sold, or transferred depends on where care will actually be delivered, and an order that leaves someone with a share of sale proceeds but nowhere suitable to live has not solved anything.
On maintenance, the case for a periodic order rather than a lump sum is often stronger where needs are open-ended and may rise, though a lump sum can be preferable where enforcement against the payer looks difficult. Care costs, medical costs and the cost of any supervision or assistance should be evidenced properly.
Finally, look past the divorce. Once the marriage ends, the incapacitated person’s will, CPF nomination, insurance nominations and any existing LPA all need attention, and none of that happens automatically. If you want advice on your own situation, we can connect you with a licensed Singapore law practice through the contact page.
