Making a valid will in Ontario is not simply a matter of writing down your wishes. The Succession Law Reform Act, RSO 1990, c S.26 (SLRA) sets out precise formal requirements that every will must meet. Failure to comply with even one requirement — such as having an improper witness — can render the entire document invalid. When a person dies without a valid will (intestate), Ontario's intestacy rules under the SLRA govern the distribution of their estate, which may produce results very different from what the deceased intended. This guide explains exactly what Ontario law requires for a will to be legally valid.
Formal Requirements Under SLRA Section 4
Section 4 of the SLRA sets out the formal requirements for a will made by an adult (a person 18 years of age or older, or a person under 18 who is or was married, or is a member of the Canadian armed forces on active service):
- The will must be in writing (typed or printed documents are acceptable — it does not need to be handwritten unless it is a holographic will).
- The will must be signed by the testator (the person making the will) at its end or, if the testator is unable to sign, by some other person in the testator's presence and at the testator's direction.
- The testator's signature must be made or acknowledged in the presence of two or more witnesses who are both present at the same time.
- Each witness must attest and sign the will in the presence of the testator.
Testamentary Capacity
Beyond the formal requirements, the testator must have had legal capacity to make the will at the time it was signed. Under Ontario common law (and as confirmed in Banks v Goodfellow [1870], which remains the leading authority in Canada), testamentary capacity requires that the testator:
- Understand the nature of the act of making a will and its effects (i.e., that it disposes of their property on death).
- Understand the extent and nature of their property (a general understanding, not an itemized inventory).
- Understand the claims of those who might reasonably expect to benefit from the estate (natural beneficiaries such as spouse and children).
- Not be suffering from any disorder of the mind that poisons their affections, perverts their sense of right, or prevents the exercise of their natural faculties.
A diagnosis of dementia or mental illness does not automatically mean a person lacks testamentary capacity — capacity is assessed at the specific moment the will is signed, and a person with cognitive decline may have capacity during a lucid interval. However, where capacity is in doubt, medical evidence and contemporaneous notes from a lawyer or notary can be critical in later litigation.
Undue Influence
Even a testator with legal capacity may be subject to undue influence — pressure or coercion by another person that overrides the testator's free will and substitutes another's wishes for their own. Common indicators of undue influence include:
- The testator being isolated from family or friends by a potential beneficiary before the will is signed.
- A sudden change in the terms of the will, especially if the change benefits the person who accompanied the testator to the lawyer's office.
- The testator expressing fear or anxiety about displeasing a particular person.
- The beneficiary actively participating in the instructions given to the will-drafting lawyer.
A will that was the product of undue influence can be challenged and set aside in a court proceeding, even if all the formal requirements were met.
The Two-Witness Rule: Who Can Witness
Ontario law requires two independent witnesses to a will. The key word is "independent" — a person who is a beneficiary under the will, or the spouse of a beneficiary, should not witness the will. Under the SLRA, a gift to a witness (or the witness's spouse) is void, even if the will is otherwise valid. The witness's signature does not invalidate the will itself — but the gift to that witness is cancelled.
To be safe, witnesses should be:
- Adults (18 or older).
- Not named as beneficiaries or executors in the will (though a named executor who is not a beneficiary may witness — but best practice is to avoid this).
- Not the spouse of any beneficiary.
- Mentally competent at the time of witnessing.
Holographic Wills: Handwritten Wills in Ontario
Ontario is one of the few provinces that recognizes holographic wills — wills that are entirely in the testator's own handwriting and signed by the testator, without requiring any witnesses. Under SLRA s.6, a holographic will is valid in Ontario without the two-witness requirement.
While holographic wills are legally valid, they carry significant practical risks:
- If any part of the document is not in the testator's handwriting (e.g., if it is partly typed or partly filled in using a printed form), it may not qualify as holographic.
- Unclear handwriting or ambiguous language can lead to expensive litigation over interpretation.
- There is no independent verification of the testator's mental state at the time of writing.
- Courts have occasionally refused to probate holographic wills where it was unclear which document was intended to be the final will.
Holographic wills are best reserved for emergency situations (e.g., a person who believes they are dying and has no other option). For regular estate planning, a properly witnessed typed will is strongly preferred.
Execution Ceremony: What Happens at Signing
The formal act of signing a will — often called the execution ceremony — is straightforward but must be done correctly:
- The testator and both witnesses should be physically present together (or connected via videoconference for remote witnessing).
- The testator signs (or acknowledges their signature on) the will in the presence of both witnesses simultaneously.
- Each witness then signs the will in the presence of the testator. Witnesses do not need to read the will and do not need to know its contents — they are only witnessing the signature.
- An attestation clause (stating that the testator signed in the presence of the witnesses and that the witnesses signed in the presence of the testator) is included in the will — while not strictly required, it creates a presumption of proper execution.
Codicils and Storing Your Will
A codicil is a document that amends, modifies, or supplements an existing will without replacing it entirely. A codicil must be executed with the same formalities as the original will (signed by the testator in the presence of two witnesses). Making minor changes to a will by crossing out words or writing in the margins is not effective and can create uncertainty about the will's meaning.
Once executed, a will should be stored in a secure location where it can be found after the testator's death. Options include:
- A fireproof home safe (inform your executor where it is and ensure they can access it).
- With your estate lawyer (many lawyers store original wills for clients at no extra charge).
- Ontario's Wills Registry at the Ontario government (search service only — does not store the will itself).
- A bank safety deposit box (note that access may be restricted after death — ensure your executor has access).