Kimel Law Group
October 8th, 2025
Contesting a will in Ontario can affect family relationships, financial legacies, and the administration of an estate. Understanding when and how a will can be challenged helps set realistic expectations…
What are the Grounds for Contesting a Will in Ontario?
Ontario courts start with the presumption that a validly signed will reflects the true intentions of the deceased. To succeed in a challenge, one of the following grounds must be proven:
- Suspicious circumstances:
Even if the will appears valid, unusual circumstances may lead the court to examine whether the will truly reflects the testator’s wishes. - Lack of testamentary capacity:
The testator did not understand what they were signing, the nature of their assets, or the claims of those who might expect to benefit. - Undue influence:
The testator was pressured or coerced into making the will, and it does not reflect their independent intentions. - Improper execution:
The will was not signed and witnessed in accordance with Ontario’s legal requirements. - Fraud or forgery:
The document is not authentic, or the testator was misled into signing it.
Who Can Contest a Will in Ontario?
Not everyone has the right to challenge a will. In Ontario, the right generally belongs to those with a financial interest in the estate, such as:
- Beneficiaries named in the contested will
- Beneficiaries under a prior will
- Individuals who would inherit if no will exists, such as spouses, children, or other close relatives
