TREADSTONE LAW · ONTARIO · DIGITAL LEGAL SERVICES · EST. MMXXI ·TSL
Licensed by the Law Society of OntarioFlat fees published upfrontWe reply to messages within 1 business daySign in
Home/Articles/Wills & Estates
№ 22 Wills & Estates

Notice of Objection to Probate in Ontario: What It Does

Learn how a notice of objection works in Ontario estates, who can file Form 75.1, how long it lasts, and what happens after the applicant responds.

Wills & Estates5 min readTSLBy the Treadstone Law Team · OntarioUpdated November 1, 2026
← All articles
Key takeaways
  • Anyone who appears to have a financial interest may file a notice of objection before a certificate is issued.
  • A notice of objection expires three years after it is filed.
  • If the objector does not serve a notice of appearance within 20 days of the notice to objector, the application goes ahead as if no objection had been filed.

If you think a will is invalid, or that the wrong person is applying to run an estate, you may be worried that a certificate will be issued before you can act. A notice of objection is the tool Ontario's rules give you to be heard first.

This article explains what a notice of objection is, who can file one, what happens next, and why a deadline can make or break your position.

What a notice of objection is

Under r. 75.03(1), at any time before a certificate of appointment of estate trustee is issued, anyone who appears to have a financial interest in the estate may file a notice of objection on Form 75.1. It must state the nature of their interest and of the objection.

Filing does not decide the dispute. It puts the applicant and the court on notice that someone intends to contest the application.

What happens after you file

That 20-day window is short, so keep an eye out for the notice and get advice as soon as it arrives.

How long it lasts

A notice of objection expires three years after it is filed. The objector may withdraw it, or the court may order it removed.

StepDetail
File Form 75.1Before a certificate is issued
Applicant serves Form 75.3Notice to objector
Serve Form 75.4Within 20 days
ExpiryThree years after filing

The wider dispute

A notice of objection is usually the first step. Questions about whether the will is valid may then be sorted out through an application for directions, where a minimal evidentiary threshold applies. Whoever puts forward the will has the burden on capacity, execution, and knowledge and approval, and whoever alleges undue influence must prove it.

If the concern is capacity, the Court of Appeal for Ontario has described what a sound disposing mind requires. The person making the will must understand the nature and effect of a will, recollect the nature and extent of their property, and understand the extent of what they are giving. They must also remember the people they might be expected to benefit and, where applicable, understand the claims of people they are excluding. A disorder that may affect capacity is considered when applying that test, but it is an error to infer a lack of capacity from alcohol or drug use alone.

Time limits for the underlying challenge still matter. The basic limitation period is two years from discovery.

If a certificate has already been issued, the court may revoke it on the application of a person with a financial interest, for example if it was issued in error or through fraud on the court.

Related issues that often come up

Some wills are challenged because of a signing problem, and some because of a change in the deceased's relationships. The Superior Court of Justice may order that a document that was not properly executed is as valid and fully effective as the deceased's will. Unless the will shows a contrary intention, gifts to a former spouse and their appointment as executor are revoked if the marriage ends after the will is made.

If your concern is who is applying, Ontario's probate guidance says that with no will, the spouse or common-law partner usually has the first right to apply. If there is none, a close adult relative (child, parent, grandchild, sibling or nephew/niece) can apply. The court may grant administration to the married spouse, to the person the deceased was living with in a conjugal relationship outside marriage immediately before death, or to the next of kin, or to both. Where there is insolvency or other special circumstances, the court does not have to appoint the person otherwise entitled.

A bond is required when the deceased died without a will, when the applicant was not named as estate trustee, or when the applicant does not live in Ontario, another province or territory, or a Commonwealth country. It is generally double the value of the estate unless a judge orders otherwise. In special circumstances, a judge may reduce the bond or dispense with it.

Once someone has been appointed, a person with a financial interest, such as a beneficiary, may move for orders requiring the estate trustee to file a statement of estate assets, give further particulars, or pass accounts. The Superior Court of Justice may also remove a personal representative on any ground on which it may remove any other trustee. The Court of Appeal for Ontario has said that removing estate trustees whom the deceased specifically chose is a serious matter, because it intrudes on the deceased's intention.

What to do next

Frequently asked questions

Who can file a notice of objection?

Anyone who appears to have a financial interest in the estate. The notice must state the nature of that interest and of the objection.

Can I file after the certificate is issued?

A notice of objection must be filed before the certificate is issued. After that, a person with a financial interest may apply to revoke the certificate on grounds such as error or fraud on the court.

What if I miss the 20 days?

If you do not serve a notice of appearance within 20 days after service of the notice to objector, the application goes ahead as if no objection had been filed.

Does the objection last forever?

No. It expires three years after it is filed, and you may withdraw it or the court may order it removed.

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.

This is a wills & estates question

Start a file online — flat, published fees, reviewed by a licensed lawyer before a dollar is owed.

ContactStart a File →