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Find a Lawyer » Canada Legal Guides » Ontario Legal Guides » Business & Commercial Law Ontario » Business Litigation Guides Ontario » What to Do If a Former Business Partner Defames Your Company Online in Ontario

What to Do If a Former Business Partner Defames Your Company Online in Ontario

11 Jun 2026 5 min read No comments Business Litigation Guides Ontario
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If a former partner publishes false statements that harm your business reputation in Ontario, you may sue for corporate defamation. You must act quickly to send a formal Libel Notice, and you can file a Statement of Claim in the Superior Court of Justice, where the basic filing fee is $339 CAD.

In today’s digital age, a company’s reputation is its most valuable asset. 📈 Whether your business is a bustling restaurant in Toronto, a tech firm in Ottawa, or a manufacturing plant in Mississauga, online reviews and social media posts can make or break your bottom line. When a former business partner turns hostile and begins spreading malicious falsehoods online, the financial impact can be devastating.

Defamation in Ontario occurs when someone makes a false statement to a third party that lowers your company’s reputation in the eyes of a reasonable person. When this statement is written down or posted on the internet, it is known as libel. Taking legal action is often necessary to stop the bleeding, protect your brand, and recover your lost profits.

Step-by-Step Process for Litigating Defamation in Ontario

Corporate litigation for defamation is governed by the common law and the strict rules of the Ontario Libel and Slander Act. 📍 It is a complex process that requires meticulous evidence gathering. Here is a general step-by-step guide to addressing online corporate defamation.

Step 1: Preserve the Digital Evidence

The very first thing you must do is secure proof before the former partner deletes their posts. Take high-resolution screenshots of the defamatory statements, including the date, time, the platform (e.g., LinkedIn, Facebook, Google Reviews), and the URL. If the comments were made in a private industry group or sent via email to your clients in Brampton or Hamilton, obtain copies of those communications immediately.

Step 2: Identify the Anonymous Author (Norwich Order)

Often, a rogue former partner will use fake accounts to post defamatory reviews. 👤 If you do not know who is behind the “anonymous” attacks, your law firm can apply to the Superior Court of Justice for a ‘Norwich Order’. This is a court order that forces third-party platforms or internet service providers (ISPs) to reveal the IP address and subscriber information of the person who posted the harmful content.

Step 3: Serve a Formal Notice of Libel

In Ontario, if the defamation was published in a newspaper or broadcast, the Libel and Slander Act requires you to serve a formal written Notice of Libel within 6 weeks of discovering the statement. While the law is evolving regarding standard social media posts, it is generally standard legal practice for your lawyer to send a robust Cease and Desist letter combined with a Notice of Libel, demanding an immediate retraction and apology.

Step 4: File a Statement of Claim

If the former partner refuses to remove the posts or compensate you for the damage, the next step is filing a Statement of Claim at the Superior Court of Justice. 📄 This document outlines the exact defamatory words used, the context, and the specific financial damages your business has suffered (e.g., lost contracts, decreased sales). You must explicitly plead that the statements were false and made with malice.

Step 5: Navigate the Discovery and Trial Phases

After the defendant files their Statement of Defence, the litigation moves into the ‘Discovery’ phase. Here, both sides exchange internal documents and conduct cross-examinations under oath. Most corporate defamation cases in Ontario are settled during mediation shortly after Discovery. If no settlement is reached, the case will proceed to a full trial before a judge.

How Much Does a Defamation Lawsuit Cost in Ontario?

Litigating defamation is highly fact-specific and can be quite expensive. 💰 Here is a breakdown of the typical costs you might expect in CAD:

  • Court Filing Fees: Filing a Statement of Claim in the Ontario Superior Court of Justice currently costs approximately $339 CAD.
  • Lawyer Fees: Retaining a seasoned commercial litigator to draft a Cease and Desist letter generally costs between $1,000 and $2,500 CAD. If the matter goes to a full trial, total legal fees can easily range from $50,000 to $150,000+ CAD.
  • Expert Witnesses: You may need to hire a forensic accountant to quantify your exact economic losses, which typically costs $5,000 to $15,000 CAD.

How Long Does the Process Take?

Defamation cases require patience. Sending a legal demand letter and achieving a retraction can sometimes resolve the issue in 2 to 4 weeks. However, if you must litigate, the Superior Court system is heavily backlogged. Reaching the Discovery phase often takes 8 to 12 months, and a full trial may not occur until 2 to 4 years after the initial claim is filed.

Libel vs. Slander in Business Law

Understanding the format of the defamation is crucial for your legal strategy. 📝 Here is how Ontario law generally differentiates the two.

Type of DefamationFormatProof of Financial Damage Required?
LibelWritten, printed, or broadcast (e.g., Google reviews, emails, podcasts).No. Damages are generally presumed because the record is permanent.
SlanderSpoken words (e.g., oral gossip at a trade show).Yes. You must usually prove actual economic loss (special damages).

Frequently Asked Questions (FAQ)

What are the main defences to defamation in Ontario?

The most absolute defence is Truth (Justification); if the statement is factually true, it is not legally defamatory. Other common defences include Fair Comment (an honestly held opinion on a matter of public interest) and Qualified Privilege (statements made to fulfill a legal or moral duty).

What are Anti-SLAPP laws?

Ontario has Anti-SLAPP (Strategic Lawsuits Against Public Participation) legislation designed to dismiss lawsuits that are merely intended to silence critics on matters of public interest. If your former partner proves your lawsuit is a SLAPP, your case could be dismissed, and you may have to pay their legal costs.

Can I sue Google or Facebook for the review?

Generally, no. Under Canadian law, internet platforms acting simply as neutral hosts or conduits are rarely held liable for the defamatory content posted by independent users. Your legal action must target the actual author of the comments.

Are there time limits to sue for defamation?

Yes, strict time limits apply. Under the Ontario Limitations Act, you generally have exactly two years from the date you discovered (or ought to have discovered) the defamatory statement to file a lawsuit. For media broadcasts, the timeframe for providing notice is even shorter (6 weeks).

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