To contest a will in Singapore you need a recognised legal ground: that the person lacked the mental capacity to make it, that they were unduly influenced, that it was forged or obtained by fraud, that they did not know and approve its contents, or that it was not signed and witnessed properly. Feeling that the will is unfair is not a ground. Singapore law starts from the position that people may leave their property to whoever they like.
That is the short answer, and it is why most challenges do not succeed. This article sets out each ground, who is entitled to bring a challenge, how the process actually runs through the courts, and the separate route available to certain dependants who were left without reasonable provision.
The grounds for challenging a will
Lack of testamentary capacity
The person making the will, the testator, must have understood, at the time of signing, the nature of what they were doing, roughly what they owned, and who might reasonably expect to benefit. They must not have been suffering from a disorder of the mind that distorted those judgments.
Capacity is assessed at the moment of execution, not generally. Someone with dementia can have periods of lucidity, and a diagnosis alone does not invalidate a will. What decides these cases is contemporaneous evidence: medical records around the date, notes from the solicitor who took instructions, and whether a doctor was asked to assess the testator at the time. A will made under a lawyer’s supervision with a medical opinion on file is very hard to unseat on this ground.
Undue influence
This means the testator’s own wishes were overborne: coerced, not merely persuaded. Encouraging an elderly parent to leave you more, or being the child who cared for them and was rewarded for it, is not undue influence. Pressure so strong that the testator made a will they did not truly want is.
It is the hardest ground to prove. The only person who could describe the pressure is dead, and the court will not infer coercion just because the outcome looks lopsided. Suspicious circumstances help (a sudden change late in life, a new will drafted by the main beneficiary, isolation of the testator from other family) but they must be shown, not assumed.
Fraud or forgery
Forgery is an allegation that the signature or the document is not genuine. Fraud covers deception that produced the will, for example lies told about another family member to induce the testator to cut them out. Courts require clear evidence, and handwriting or document examination is usually needed. Making the allegation without a proper basis is risky and can attract a costs order.
Want of knowledge and approval
Even where capacity existed and no one coerced anyone, the will must reflect what the testator actually understood it to say. This ground arises where, for instance, the testator was blind, illiterate, unwell, or did not read the language the will was drafted in, and there is doubt that the contents were explained to them. It also arises where the person who prepared or arranged the will is a substantial beneficiary, circumstances the courts describe as exciting suspicion, requiring the party propounding the will to prove the testator knew and approved of it.
Failure of formal validity
The Wills Act 1838 sets out formalities that must be met. A will must be in writing, signed by the testator (or by someone else at their direction and in their presence), and that signature must be made or acknowledged in the presence of two or more witnesses present at the same time, who then sign in the testator’s presence.
Two defects come up repeatedly in home-made wills. The first is witnesses who were not both present together when the testator signed: one signing in the kitchen and one an hour later invalidates the will. The second is the beneficiary-as-witness rule: if a beneficiary, or the spouse of a beneficiary, signs as a witness, the will remains valid but the gift to that person generally fails. Our guide to DIY will templates and where they go wrong goes into the practical traps in more detail, and how will writing works in Singapore covers what a properly executed will looks like.
Revocation issues
A will can be revoked by a later will, by a written declaration of revocation, or by destruction with the intention of revoking. Two rules catch people out:
- Marriage revokes a will, subject to limited exceptions such as a will expressly made in contemplation of that marriage. Someone who marries after making a will may die intestate without realising it.
- Divorce does not revoke a will. An ex-spouse named in an old will can still inherit. If you have divorced, make a new will; this is one of the most common and most avoidable failures in Singapore estate planning, and it sits alongside CPF nominations and insurance beneficiaries in the review you should do after a divorce.
Disputes also arise where a later will is referred to but cannot be found, or where an earlier will was revoked by a later one that is itself invalid.
Who can challenge a will
You need standing, an interest in the outcome. In practice that means:
- A beneficiary under the disputed will whose gift is affected.
- A beneficiary under an earlier will who would benefit if the disputed will fails.
- A person who would inherit on intestacy under the Intestate Succession Act if there were no valid will at all, typically a spouse, children or parents.
- A creditor of the estate, in limited circumstances.
A friend, a distant relative with no entitlement either way, or someone who was simply told they would be provided for has no standing to challenge validity.
The process, step by step
- Find out what is happening with the estate. Before anything else, establish whether an application for a grant has been filed and by whom.
- File a caveat. A caveat lodged with the court prevents a grant of probate, or letters of administration where there is no valid will, from being issued without notice to you. It is a pause button, not a claim, and it gives you room to investigate.
- Investigate. Request the will file from the drafting solicitor, obtain medical records, and identify witnesses. Much of the real work happens here, and it often ends the dispute either way.
- Warning and appearance. The executor can serve a warning requiring you to state your interest. If you do not respond properly, the caveat can be removed and the grant proceeds.
- Proceedings. If the dispute stands, it becomes a contentious probate action, with pleadings, discovery, affidavits and ultimately a trial with cross-examination of witnesses including the drafting solicitor and treating doctors.
Mediation is available at every stage and resolves a large share of estate disputes. Litigation between siblings tends to cost more than the difference being fought over.
The realistic picture on cost and outcome
Contentious probate is expensive litigation, and the estate is not a free source of funding. There is a common belief that costs always come out of the estate; that is not the rule. Where a challenge was brought unreasonably, the losing party can be ordered to pay the other side’s costs personally.
Meanwhile the estate is frozen. Property cannot be sold, accounts cannot be distributed, and a business inside the estate can lose value while everyone argues. A dispute over a modest estate can consume a meaningful part of it in a year.
None of this means a genuine challenge should not be brought. It means the first conversation with a lawyer should be an honest assessment of the evidence, not a strategy discussion, and if the answer is that the medical notes are clean and the will was properly executed, that answer is worth paying for early.
The Inheritance (Family Provision) Act route
Separately from challenging validity, the Inheritance (Family Provision) Act allows certain dependants to apply to the court for reasonable provision out of the estate where the will, or the intestacy rules, did not make it. The Act defines who may apply and the circumstances in which the court will intervene, and it is narrower than the equivalent legislation in some other countries.
The key distinction is this: a validity challenge says the will should not stand at all. A family provision application accepts the will and asks the court to adjust what comes out of the estate for a dependant’s maintenance. There are strict time limits tied to the grant, so if you were financially dependent on the deceased and have been left without provision, take advice quickly rather than waiting to see how the estate is administered.
How to reduce the risk of your own will being contested
If you are writing a will and expect friction, the defences are built at drafting time, not afterwards:
- Use a solicitor and let them keep a full attendance note of your instructions and reasoning.
- If you are elderly or unwell, obtain a medical opinion on capacity dated the same day and keep it with the will.
- Never let a beneficiary or their spouse witness the will, and never let a main beneficiary arrange the drafting.
- Make a new will after any marriage or divorce, and revoke earlier wills clearly.
- Explain a deliberate exclusion in a separate letter of wishes, not an angry clause in the will.
The broader picture (probate, administration and what an executor has to do) is set out across our wills and probate guides.
