What documents do I need to start a divorce in Ontario?

To begin a divorce in Ontario, you file with the Ontario Superior Court of Justice. The main document is the Application for Divorce — either a joint application (both spouses sign) or a sole application (you file alone). You will also need your original or certified marriage certificate, or a registration of marriage from the province where you married. If your certificate is in another language, a certified translation is required.

If children under 18 are involved, you must include a completed parenting affidavit (Form 35.1) — the affidavit in support of claims for decision-making responsibility or parenting time. If you are seeking spousal or child support as part of the divorce, additional financial disclosure forms are required.

Once filed, the court will issue a court file number. For a sole application, your spouse must be personally served with the filed documents, and you'll need to file an affidavit proving service. Fees apply when filing, and fee waiver certificates are available if you qualify financially. A family law lawyer can help you assemble and file the package correctly the first time.