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Find a Lawyer » Canada Legal Guides » Ontario Legal Guides » Family Law & Divorce Ontario » Obtaining a Sealing Order to Protect Corporate Trade Secrets in an Ontario Divorce

Obtaining a Sealing Order to Protect Corporate Trade Secrets in an Ontario Divorce

9 Jul 2026 5 min read No comments Family Law & Divorce Ontario
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Obtaining a sealing order in an Ontario family court is notoriously difficult. You must prove to the Superior Court of Justice that public access poses a serious risk to an important public interest-such as severe harm to a business’s trade secrets-that outweighs the open court principle. Filing a motion for a sealing order involves significant legal work, though there is no court filing fee to submit a motion in Ontario family court.

Protecting Your Business Secrets During a High-Net-Worth Divorce

For entrepreneurs and corporate executives in Ontario, a divorce is not just a personal crisis; it is a profound business risk. When you litigate your separation at the Superior Court of Justice, mandatory financial disclosure forces you to submit highly sensitive corporate data. Without specific legal protections, your company’s proprietary algorithms, client lists, and confidential profit margins become accessible to the public, including your fiercest competitors.

Many business owners assume they can simply ask a judge to keep their files private. 🔒 However, the Canadian justice system prioritizes transparency. To keep your corporate trade secrets off the public record, you must successfully apply for a sealing order. This is a complex legal manoeuvre that requires demonstrating exceptional circumstances to overcome the deeply ingrained open court principle.

The Legal Test for a Sealing Order in Ontario

Judges in Ontario do not grant sealing orders merely to prevent personal embarrassment or to shield standard financial information. The Supreme Court of Canada has established a highly stringent legal framework, most notably referenced in the Sherman Estate principles, which dictates when a court file can be sealed.

To successfully obtain a sealing order for your corporate financials, your lawyer must generally prove three distinct elements. 📋 First, that court openness poses a serious risk to an important public interest. In business contexts, this often relates to the protection of highly confidential trade secrets or severe, irreparable commercial harm. Second, you must show that the sealing order is absolutely necessary to prevent this risk, meaning no other reasonable alternatives (like redacting specific names) exist. Third, the benefits of the sealing order must outweigh its negative effects on the public’s right to open proceedings.

Step-by-Step Process to Apply for a Sealing Order in Ontario

Securing a sealing order requires meticulous preparation and a formal motion before a judge. Whether your case is heard in Toronto, Ottawa, or a smaller regional courthouse, the process generally involves the following critical steps:

Step 1: Drafting the Notice of Motion

Your legal team will begin by preparing a Notice of Motion. 📝 This formal document outlines the exact relief you are requesting from the Superior Court of Justice. It specifies whether you want the entire court file sealed, or simply specific exhibits, such as a comprehensive Business Valuation Report or proprietary financial statements.

Step 2: Preparing Evidentiary Affidavits

A judge will not take your word that your business will be harmed; you need hard evidence. You must draft a detailed Affidavit explaining exactly why the information is a trade secret. You may also need expert testimony or Affidavits from corporate officers demonstrating the specific financial ruin or loss of competitive edge that would occur if the documents were made public.

Step 3: Serving the Opposing Party and Filing

Once your motion materials are complete, they must be formally served on your spouse’s lawyer. 📩 Afterward, the documents are filed at the local courthouse. It is important to request a temporary sealing order or file the materials confidentially while the motion itself is pending, so the secrets are not leaked before the judge even hears your arguments.

Step 4: Arguing the Motion Before a Judge

Finally, your lawyer will attend court to argue the motion. They will present case law and explain how your situation meets the rigorous legal test for a sealing order. Your spouse may consent to the order, which can make the process smoother, but the judge still has the final say in granting the request, as public interest is always a factor.

How Much Does It Cost to Seek a Sealing Order?

Pursuing a sealing order is a specialized legal task that adds significant expense to your family law matter. The costs involve both government fees and substantial professional fees.

  • Court Filing Fees: Filing a Notice of Motion in Ontario family law proceedings requires a $0 CAD court filing fee.
  • Lawyer Fees: Because drafting the Affidavits and arguing the complex legal test requires senior expertise, legal fees for this specific motion can easily range from $3,000 to $10,000 CAD or more.
  • Expert Fees: If you need an independent business valuator or corporate security expert to provide an Affidavit confirming the risk of commercial harm, expect additional professional fees of $2,000 to $5,000 CAD.

How Long Does the Motion Process Take?

The timeline for obtaining a sealing order depends heavily on the backlog at your local courthouse. In busy jurisdictions like Toronto or Brampton, it may take several weeks to a few months to get a hearing date for your motion. If the matter is incredibly urgent-for example, if sensitive documents are about to be filed by the opposing party-your lawyer may bring an urgent or ex parte motion, which can be heard in a matter of days.

Alternatives to a Sealing Order

Given the difficulty of obtaining a sealing order, it is wise to explore alternative methods of keeping your corporate data private.

Alternative MethodHow It WorksLevel of Privacy
RedactionBlacking out specific sensitive data (like client names or exact formulas) before filing the document in court.Moderate (Financial totals are still visible).
Confidentiality Agreements (NDAs)Spouses sign an agreement outside of court promising not to disclose financial details shared during settlement negotiations.High (But only binds the parties involved).
Private ArbitrationTaking the entire divorce out of the public court system and hiring a private arbitrator to resolve the dispute.Maximum (The entire process is held behind closed doors).

Frequently Asked Questions (FAQ)

Will a judge grant a sealing order just because I am a public figure?

Generally, no. Ontario courts have consistently ruled that personal embarrassment or the desire to protect one’s reputation as a public figure is not sufficient to override the open court principle.

Does my spouse have to agree to the sealing order?

Your spouse’s consent makes the process easier, but it does not guarantee success. The judge must still be satisfied that the legal test is met, as the court must protect the public’s right to access judicial proceedings.

Can I appeal if the judge denies my request for a sealing order?

Yes, it is possible to seek leave to appeal a judge’s decision on a sealing order. However, appeals are costly, time-consuming, and require demonstrating that the motion judge made a palpable and overriding error in applying the law.

What happens if sensitive information is filed before I get a sealing order?

If the documents are already in the public file, the damage may be done. This is why it is critical for your lawyer to seek a temporary sealing order or establish a confidentiality protocol before any substantial financial disclosure is officially filed.

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