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How to Sue a Business Partner in Toronto

Helping Canadian Businesses Get Licences, Stay Onside And Resolve Their Legal Challenges.

When dealing with a business partner, trust and a shared vision are essential for success. Unfortunately, disputes can arise, and when they do, they often lead to a breakdown in the relationship. In some cases, the only means of resolution may be through legal action. This article will serve as a guide for individuals seeking to sue a business partner in the province of Ontario, Canada.

Understanding the Legal Basis for Suing a Business Partner

Before pursuing legal action, it’s crucial to understand the legal grounds for doing so. In Ontario, there are several potential causes of action for suing a business partner.

Breach of Contract

Breach of contract occurs when one party fails to uphold their end of a contractual agreement. This could include a failure to deliver goods or services, a failure to pay agreed-upon compensation, or a failure to meet other specified obligations. To prove a breach of contract claim, the plaintiff must demonstrate that a valid contract exists, that the defendant breached the terms of the contract, and that the plaintiff suffered damages as a result.

For example, imagine that two partners, John and Jane, agree to split the profits of their business 50/50. However, John starts taking more money than he is entitled to without Jane’s knowledge or consent. In this case, Jane could sue John for breach of contract and seek damages for the lost profits she should have received.

Breach of Fiduciary Duty

Partners in a business owe each other a fiduciary duty to act in good faith and with honesty and loyalty. Breach of fiduciary duty occurs when a partner acts against the best interests of the company or takes advantage of their position for their benefit. Examples could include embezzlement, self-dealing, or failing to disclose conflicts of interest. To prove a breach of fiduciary duty claim, the plaintiff must demonstrate that a fiduciary relationship existed, that the defendant breached their duty, and that the plaintiff suffered damages as a result.

For instance, let’s say that John and Jane are partners in a business, and John uses company funds to pay for his personal expenses without Jane’s knowledge or consent. In this case, Jane could sue John for breach of fiduciary duty and seek damages for the money that John misappropriated.

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Fraud or Misrepresentation

Fraud occurs when a party intentionally deceives another for personal gain. Misrepresentation occurs when a party makes a false statement or conceals material information that induces another party to enter into an agreement. To prove a fraud or misrepresentation claim, the plaintiff must demonstrate that the defendant made a false statement or acted with the intent to deceive, that the plaintiff relied on the false statement in entering into the agreement, and that the plaintiff suffered damages as a result.

For example, imagine that John tells Jane that their business is doing well and that they have secured a lucrative contract with a major client. However, John knows that the contract fell through, and he only told Jane to keep her invested in the business. In this case, Jane could sue John for fraud or misrepresentation and seek damages for the losses she incurred as a result of relying on John’s false statement.

Unjust Enrichment

Unjust enrichment occurs when one party gains a benefit at another’s expense without a legal justification. This could occur when a partner misappropriates funds or steals clients or business opportunities from the company. To prove an unjust enrichment claim, the plaintiff must demonstrate that the defendant was enriched, that the enrichment was at the plaintiff’s expense, and that there is no legal basis for the enrichment.

For instance, let’s say that John takes a client list from the business and uses it to start his own competing business, depriving Jane of potential profits. In this case, Jane could sue John for unjust enrichment and seek damages for the profits she lost as a result of John’s actions.

It’s important to note that these are just a few examples of the legal grounds for suing a business partner in Ontario. Each case is unique, and it’s essential to consult with a lawyer who can help you determine the best course of action for your specific situation.

Preparing for Legal Action

Before initiating a lawsuit, it’s important to prepare appropriately. This section will discuss steps to take before filing legal action against a business partner.

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Legal disputes with business partners can be incredibly stressful and emotionally draining. It’s important to take the time to prepare your case thoroughly and gather as much evidence as possible to support your claim.

Gathering Evidence

It’s crucial to gather evidence to support your claim before initiating legal action. This could include contracts, emails, text messages, financial statements, or other documentation that would support your claim. It’s also important to document any conversations or interactions with your business partner that are relevant to the dispute.

Gathering evidence can be a time-consuming process, but it’s essential to the success of your case. You may need to request documents from your business partner or third-party organizations, such as banks or accounting firms. It’s important to be persistent and thorough in your efforts to gather evidence.

Consulting with a Lawyer

It’s recommended that you consult with a lawyer familiar with business law and dispute resolution before pursuing legal action. A lawyer can help you evaluate your claim, identify your legal options, and ensure that you’re taking the necessary steps to prepare your case.

Working with a lawyer can also help alleviate some of the stress and uncertainty of the legal process. Your lawyer can help you understand the legal terminology and procedures involved in your case, and provide guidance on how to navigate the legal system.

Sending a Demand Letter

Before initiating legal action, it’s often appropriate to send a demand letter to your business partner outlining the details of your claim and the relief sought. This letter should also provide a deadline for the business partner to respond before legal action is pursued.

A demand letter can serve as a way to open lines of communication between you and your business partner, and may even result in a resolution of the dispute without the need for legal action.

Attempting Alternative Dispute Resolution

Before proceeding with litigation, it may be appropriate to attempt alternative dispute resolution methods such as mediation or arbitration. These methods can help parties resolve disputes outside of the courtroom, potentially saving time and money.

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Mediation involves a neutral third party who works with both parties to reach a mutually acceptable agreement. Arbitration involves a neutral third party who listens to both sides and makes a binding decision.

Alternative dispute resolution methods can be less adversarial than traditional litigation, and can help preserve relationships between business partners. However, it’s important to keep in mind that these methods may not be appropriate for every situation, and it’s important to consult with a lawyer before pursuing any legal action.

Initiating the Lawsuit

If alternative dispute resolution methods are not successful, litigation may be necessary. This section will outline the steps involved in initiating a lawsuit against a business partner in Ontario.

Filing a Statement of Claim

The first step in initiating a lawsuit is filing a statement of claim with the court outlining the details of your claim. This statement should include the legal basis for your claim, the relief sought, and the details of your evidence.

Serving the Defendant

After filing a statement of claim, you must serve your business partner with a copy of the claim. This ensures that they are aware of the lawsuit and have the opportunity to respond.

Managing the Discovery Process

The discovery process is the stage of litigation where each party collects evidence from the other side. This may include document requests, interrogatories, and depositions. During this process, it’s crucial to work with your lawyer to identify and obtain any relevant evidence.

Preparing for Trial

Before trial, there may be opportunities for settlement negotiations or resolutions through alternative dispute resolution methods. However, if the case proceeds to trial, it’s essential to work with your lawyer to prepare your case and ensure that you’re presenting the strongest possible argument to the court.


Suing a business partner is never an ideal situation, but in some cases, it’s the only means of resolution. Understanding the legal basis for your claim, gathering evidence, and working with a lawyer are all crucial steps in pursuing legal action. With proper preparation and guidance, individuals can successfully navigate the legal process and find resolution to disputes with business partners.

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