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Changing a Final Family Court Order in Ontario: What to Know

Learn how changing a final family court order works in Ontario, what steps and evidence matter, and where to get help before you file anything.

Family Law4 min readTSLBy the Treadstone Law Team · OntarioUpdated November 13, 2026
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Key takeaways
  • If someone does not obey an order in a case, the court may make any order it considers necessary, including costs, dismissing a claim or striking out documents.
  • In support cases, a party must serve income and financial information, so it is worth gathering your current income documents early.
  • What you must show to change an order depends on the type of order, so confirm the test with a lawyer before you file.

Life changes after a court order is made. A job may be lost, a child's needs may shift, or a parent may move. If your final order no longer fits your situation, you may be wondering how to change it.

This article explains the practical points that apply in Ontario family cases generally, and it does not replace advice on your own situation. The exact test for changing a final order and the forms to use depend on the kind of order, so a lawyer or Family Law Information Centre can confirm those details for you.

Keep following the order while you seek a change

How a change in your circumstances affects an existing order depends on your situation, so it is worth confirming with a lawyer. If a person fails to obey an order in a case, the court may make any order it considers necessary under rule 1(8), including costs, dismissing a claim or striking out documents.

For that reason, it is usually safer to keep complying while you ask for a change, rather than deciding on your own to stop.

Think about what has actually changed

What the court needs to see before it changes an order depends on your situation, so it is worth confirming with a lawyer. Before taking any step, write down what is different since the order was made and when it happened.

The legal standard for what counts as a sufficient change differs depending on the type of order, and a lawyer can tell you which one applies to yours.

Financial information for support changes

If support is part of the issue, expect to deal with financial disclosure. A party making a claim for support, property or exclusive possession of the matrimonial home must serve and file a financial statement, Form 13 or 13.1. Form 13 (Support Claims) is used where support is claimed with no property claim and no claim for exclusive possession of the matrimonial home.

In support cases, a party must also serve the income and financial information in s. 21(1) of the Child Support Guidelines. If they became unemployed within the last three years, they must serve a complete copy of the Record of Employment or other proof of termination, plus a statement of any continuing benefits from the former employer. For child support, they must serve proof of any special or extraordinary (s. 7) expenses.

If a party has not served or filed required financial documents, the court may, on motion, order them to do so, and it must also order the party to pay costs. Whether these exact rules apply to a request to change a final order can depend on how the case proceeds, so confirm this before you file.

Agreements, mediation and offers

Whether a final court order can be changed by agreement depends on your situation, so it is worth confirming with a lawyer. Separately, a domestic contract, such as a separation agreement, or an agreement to amend or rescind one, is unenforceable unless it is made in writing, signed by the parties and witnessed. A party may file a domestic contract with the clerk of the Ontario Court of Justice or the Family Court so that its support provisions can be enforced.

Mediation can help. Ontario describes it as a negotiation with the help of a mediator who does not take sides or give legal advice. The mediator writes up what the parties agreed, and Ontario advises that each party get advice from a different lawyer before signing to make it legally binding.

An offer to settle must be signed personally by the party making it and by their licensed representative.

What to do next

Low-income people may get free legal advice at court from Legal Aid Ontario advice lawyers and duty counsel.

Frequently asked questions

Can I just stop following an order if my circumstances changed?

It is risky. If a person fails to obey an order, the court may make any order it considers necessary, including costs, dismissing a claim or striking out documents. A lawyer can explain safer options.

Can my ex and I agree to change the order ourselves?

How a final order can be changed depends on the kind of order and on your situation, so it is worth confirming with a lawyer before you rely on any agreement. Getting separate legal advice before signing is wise.

Will I need to share financial information?

In support cases, a party must serve income and financial information set out in the Child Support Guidelines. A financial statement may also be required when support or property is claimed.

Where can I get help with the forms?

Family Law Information Centres at family courts give free court forms and general information about procedure. Their staff give information, not legal advice.

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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