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Family

What Happens If My Ex Breaks the Separation Agreement in Ontario?

TSL Written by the Treadstone Law Team· Updated November 1, 2026

You generally have two routes: use the Family Responsibility Office (FRO) for support terms, or go to court to enforce the agreement directly. For FRO to enforce support, the agreement must first be filed with the Ontario Court of Justice or the Family Court branch of the Superior Court of Justice, and then registered with FRO. The registration package includes a copy of the agreement, Form 26B and a completed FRO registration package.

Once support is registered, the payor pays FRO, whose enforcement tools include taking money from the payor's bank account, suspending a driver's licence and starting a court case. Using FRO costs the recipient nothing. FRO enforces only the support provisions of an agreement.

For other terms, the Ontario Court of Justice enforces properly filed domestic contracts, and its processes include default hearings. You can also ask the court to enforce parenting arrangements made in a separation agreement. A court may still disregard a term about children if that is in the child's best interests. Which step fits depends on the term that was broken, so a lawyer can confirm.

Key takeaways

  • For the Family Responsibility Office to enforce support, the agreement must first be filed with the court and then registered with the office.
  • The Family Responsibility Office enforces only the support terms, and using it costs the recipient nothing.
  • You may skip the office and go to court to enforce the agreement directly.
  • A court may still disregard a term about children if that is in the child's best interests.
This is general information, not legal advice. It doesn’t create a lawyer–client relationship, and the rules can change. For advice on your situation, a Treadstone family lawyer can help.

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Sources

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

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