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Is a No-Contest Clause Enforceable in an Ontario Will?

Wondering if an Ontario court will enforce a no-contest clause in a will? Learn what limits testamentary freedom and which claims may still be open to you.

Wills & Estates5 min readTSLBy the Treadstone Law Team · OntarioUpdated November 1, 2026
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Key takeaways
  • Ontario courts will void testamentary conditions that offend public policy, but they will not go behind a testator's clear, unconditional choice of beneficiaries.
  • Whether a particular no-contest clause would be applied to you depends on its exact wording and on what kind of claim you bring, so get the will reviewed before you act.
  • Some rights, such as a dependant support claim, are not defeated by a waiver or agreement, and the time limits for them can be short.

You have read the will, and it says that anyone who challenges it loses their gift. Now you are wondering whether to raise a concern at all, and whether the clause is something a court in Ontario would actually enforce.

There is no single answer that fits every will. This article explains what a no-contest clause is, what the law says about the limits on a testator's choices, which kinds of claims are different from a challenge to the will, and how to decide on next steps with proper advice.

What a no-contest clause is meant to do

A no-contest clause, sometimes called an in terrorem clause, is a line in a will that tries to discourage challenges. It usually says that a beneficiary who disputes the will, or goes to court about the estate, forfeits what the will would otherwise leave them.

These clauses vary a great deal in wording. Some are broad and some target only one kind of challenge. The exact words matter, and so does what you are actually asking a court to do.

What Ontario law says about testators' freedom

Ontario gives people a lot of freedom in deciding who gets their property. The Court of Appeal for Ontario has said that courts will not go behind a testator's clear, unconditional choice of beneficiaries. At the same time, that freedom is limited by legislation and public policy, and courts will void testamentary conditions that offend public policy.

Whether a given no-contest clause is enforced against a given beneficiary is a question that turns on the wording of the clause, the type of claim and the facts. It is not safe to assume the clause is automatically valid, and it is not safe to assume it is automatically empty. A lawyer who reads the will can tell you how it is likely to apply to your situation.

Claims that do not depend on attacking the will

Some rights come from legislation rather than from the will, and a will cannot simply switch them off. The clearest example is dependant support. If a deceased person has not made adequate provision for the proper support of their dependants, the court may order that adequate provision be made out of the estate, with or without a will. A court can make a support order even if the dependant signed an agreement or waiver saying otherwise.

Time limits are tight. A dependant support application generally cannot be made more than six months after the grant of letters probate or letters of administration. The court may allow a late application, but only against the part of the estate that has not yet been distributed.

Challenging the will itself

A challenge to validity is different from a support claim. If you question capacity or whether the will was properly made, the law sets out who must prove what. The person defending the will carries the legal burden of proving due execution, knowledge and approval, and testamentary capacity. Undue influence is treated differently, and the burden of proving it stays with the people attacking the will.

Before the court will require a will to be formally proved, the challenger must point to some evidence that, if accepted, would call its validity into question. That is a minimal threshold. Even so, a clause that threatens loss of a gift is a real risk to weigh, because the outcome of a challenge is never certain. This is the point where a lawyer's review of the clause and your evidence matters most.

Some steps are about protecting your position rather than attacking the will. A person with a financial interest can file Form 74P to ask the court to notify them when someone starts a proceeding involving the estate. Whether asking for notice would be treated as a challenge by a particular clause depends on its wording.

What to do next

Frequently asked questions

Will an Ontario court always enforce a no-contest clause?

There is no safe general answer. Courts void testamentary conditions that offend public policy, but they will not go behind a testator's clear, unconditional choice of beneficiaries. The wording of the clause and the type of claim matter, so have a lawyer review the will.

Can I still claim support if the will says I get nothing?

Possibly, if you meet the definition of dependant, meaning the deceased was supporting you or was legally obliged to immediately before death. A court can make a support order even where a waiver or agreement says otherwise. Adult, independent children are not entitled unless they meet that definition.

How long do I have to bring a support claim?

Generally no more than six months after letters probate or letters of administration are granted. The court may allow a later application, but only against the part of the estate not yet distributed.

Does asking for notice of court proceedings count as contesting?

That depends on the clause wording and the facts. A person with a financial interest can file Form 74P to be notified when someone starts a proceeding involving the estate. Ask a lawyer before filing if the will contains a no-contest clause.

Sources

Links go to official government, court and regulator pages. The law changes — confirm you are reading the current version.

This article is general information, not legal advice. Reading it does not create a lawyer-client relationship. Ontario laws, tax rates, and government programs change, and how the law applies depends on your specific facts. For advice about your situation, speak with a licensed Ontario lawyer. Treadstone Law is licensed by the Law Society of Ontario — reach us at 1-844-900-1070 or start a file online.

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