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Setting Aside a Divorce Order in Ontario: When Is It Possible?

Want to challenge or undo a divorce order in Ontario? Learn how the 30-day appeal period and the 31-day rule work, and why timing matters so much.

Family Law4 min readTSLBy the Treadstone Law Team · OntarioUpdated November 13, 2026
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Key takeaways
  • A divorce takes effect on the 31st day after the judgment is made, and no appeal may be brought more than 30 days after the order.
  • A pending appeal delays when the divorce takes effect.
  • Once a divorce takes effect it ends the marriage and has legal effect throughout Canada, and a pending appeal delays when it takes effect, with no appeal allowed more than 30 days after the order was made unless an appellate court extends that time on special grounds.

Sometimes a person looks at a final divorce order and wants it changed or undone. They may not have understood what was happening, or the order may not reflect what was agreed. The options are narrow, and the clock starts running when the order is made.

This article explains the deadlines the rules set, what the court had to be satisfied of before it granted the divorce, and how the other parts of your family law case may still be open. Whether a particular order can be challenged depends on the facts, so a lawyer should review it.

The deadlines that start with the order

A divorce takes effect on the 31st day after the day the judgment granting it is made. As an exception to that 31-day rule, the court can make the divorce take effect earlier if special circumstances justify it and both spouses agree and undertake not to appeal. No appeal may be brought more than 30 days after the order was made, although an appellate court can extend that time on special grounds.

A pending appeal delays when the divorce takes effect. After the divorce takes effect, it ends the marriage and has legal effect throughout Canada.

In practice, the time to act is short. If you disagree with an order, read the date it was made and confirm your options straight away.

What the court had to be satisfied of

Understanding what a judge checks helps you see whether something went wrong. Before granting a divorce, the court must be satisfied of several things:

An uncontested divorce is decided on paper. The judge may grant the divorce as drafted, return the papers for correction, or grant it with changes or refuse it after giving the applicant a chance to respond.

Changing your mind before the order

If the order has not been made yet, you may have an easier option. A party may withdraw all or part of an application, answer or reply by serving a Notice of Withdrawal (Form 12). The withdrawing party must pay every other party's costs up to the withdrawal date, unless the court orders or the parties agree otherwise.

The application, answer or reply of a special party or a child party can be withdrawn only with the court's permission.

Challenging an order versus dealing with other claims

Often the real concern is not the divorce itself but money, property or parenting. Those issues may be dealt with separately. For example, an equalization claim must be started by the earliest of 2 years after the divorce, 6 years after separation with no reasonable prospect of living together again, or 6 months after the first spouse's death.

Whether an order can be set aside or changed after the appeal period depends on the circumstances and the wording of the order. A lawyer can confirm which route, if any, fits your situation.

What to do next

Frequently asked questions

How long do I have to appeal a divorce order?

No appeal may be brought more than 30 days after the order was made. An appellate court can extend that time, but only on special grounds.

When is my divorce final?

A divorce takes effect on the 31st day after the day the judgment granting it is made, but the court can make the divorce take effect earlier if special circumstances justify it and both spouses agree and undertake not to appeal. An appeal that is still pending also delays when the divorce takes effect.

Can a divorce be undone after it takes effect?

Once it takes effect, a divorce ends the marriage and has legal effect throughout Canada. Whether anything can be done depends on the facts, so ask a lawyer to review the order.

Can I still make property claims after the divorce?

Possibly, but deadlines apply. An equalization claim must be started by the earliest of 2 years after the divorce, 6 years after separation, or 6 months after the first spouse's death.

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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