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CL-001
Injunctions Fundamentals
An injunction is an equitable remedy. Most injunctions are temporary pre-trial injunctions. But they can also be granted as permanent post-trial relief.
An injunction can be either prohibitive or mandatory.
A prohibitive injunction prohibits a party from taking certain actions. Prohibitive injunctions are the norm.
A mandatory injunction requires a party to take certain positive actions. Mandatory injunctions are rare.
Click a heading below to learn more.

An interlocutory injunction is a pre-trial injunction that usually remains in force until the final disposition of the case. It is thoroughly argued by both sides.
An interim injunction is a pre-trial injunction often sought on an ex parte basis with limited argument. It provides short-term relief until the judge can hear full argument on an interlocutory injunction. The applicant must typically show some urgency.
A quia timet injunction prevents anticipated harm that is about to occur, as opposed to preventing the continuation or repetition of an existing harm.
For a brief explanation of common injunctions, see 1711811 Ontario Ltd. (AdLine) v. Buckley Insurance Brokers Ltd., 2014 ONCA 125, at paras 49-59.
The following specialized injunctions have unique applications and legal tests (see the lesson on specialized injunctions to learn more):
- Anton Piller orders
- Mareva injunctions
- Norwich orders
The leading case for pre-trial injunctions continues to be RJR-MacDonald Inc v Canada (Attorney General), [1994] 1 SCR 311. This case sets out a 3-part test that applies to both interlocutory and interim injunctions:
- There is a serious issue to be tried.
This is a low threshold. Extensive examination of the merits is not undertaken. Once the application is not frivolous or vexatious, the judge proceeds to the rest of the test.
Ask yourself: “Is the underlying application frivolous or vexatious?”
-
Irreparable harm will result if the injunction is not granted.
Judges should take a broad view of irreparable harm. This is harm which cannot be quantified in monetary terms or harm that cannot be cured. Examples include putting a party out of business or preventing a party from earning a livelihood.
Ask yourself: “Would monetary damages be an inadequate remedy if the plaintiff succeeds?”
- The balance of convenience favours granting the injunction.
The balancing is case dependent. Most injunctions turn on this issue. The analysis should be evidence based. In Charter cases, the judge should also consider the public interest. If necessary, the judge can revisit the relative strength of each party’s case to tip the balance.
Ask yourself: “Which party suffers greater harm from granting or refusing the injunction?”
A judge should not simply seek to “preserve the status quo”. In RJR-MacDonald the Supreme Court finds that such an approach has “limited value in private law” and “has no merit” in Charter cases. Rather, the judge must consider the situation under the 3-part analysis described above.
If an injunction is granted on an ex parte basis, it must be of limited duration and the moving party must typically bring a further motion to continue the injunction. The moving party must make full and frank disclosure.
Situations Requiring a Modified RJR-MacDonald Test
In the following situations, the first prong of the RJR-MacDoanld test is modified:
- A mandatory injunction requiring a party to take positive steps, or
- An injunction that effectively ends the litigation (picketing, defamation, public elections, take-over bids, and covenants restraining trade are all examples).
In these situations, at the first prong of the test the moving party must demonstrate a strong prima facie case.
See:
R. v. Canadian Broadcasting Corp., 2018 SCC 5, at para 15;
Medical Laboratory Consultants Inc. v. Calgary Health Region, 2005 ABCA 97, at para 4.
While the rest of the RJR-MacDonald test is unchanged, a finding of a strong prima facie case may impact the analysis under the second and third prongs of the RJR-MacDonald framework. The moving party is put in a stronger position. See: Toronto (City) v. A.G. Ontario, 2018 ONCA 76, at para 20.
Post-trial injunctions are usually called permanent injunctions. They are sometimes called perpetual injunctions. They form part of a final order after the parties’ rights have been fully adjudicated. The 3-part test in RJR-MacDonald does not apply.
To obtain a permanent injunction, a party is required to first establish its legal rights, and then the court must determine whether an injunction is an appropriate remedy. Irreparable harm and balance of convenience are not relevant. Permanent injunctions can be either prohibitive or mandatory.
See:
Liu v. Matrikon Inc., 2007 ABCA 310, at para 26
Cambie Surgeries Corp. v. British Columbia (Medical Services Commission), 2010 BCCA 396, at paras 27-28
1711811 Ontario Ltd. (AdLine) v. Buckley Insurance Brokers Ltd., 2014 ONCA 125, at paras 56-59.
PS-041
Specialized Injunctions
Click on one of the specialized injunctions below to learn more.

Summary
A Mareva injunction freezes the assets of the respondent pending determination of the claim. It is also known as a freeze order. The Mareva injunction prevents a respondent from secreting assets out of the Court's jurisdiction to frustrate enforcement. The name comes from Mareva Compania Naviera SA v International Bulkcarriers SA (1975), 2 Lloyd's Rep. 509.
A Mareva injunction directs the respondent to not dispose of assets. Breaching the order amounts to contempt of court. But the injunction itself does not otherwise prevent the respondent from disposing of the assets. A Mareva injunction does not give assets to the moving party, nor does it give the moving party a lien on the respondent’s assets. It gives no priority to the moving party over other creditors, and it does not affect the laws relating to insolvency.
Legal Requirements
In Chitel et al. v. Rothbart et al., 1982 CanLII 1956 (ON CA), the Ontario Court of Appeal set out the following guidelines for granting a Mareva injunction:
- The plaintiff should make full and frank disclosure of all matters in his knowledge which are material for the judge to know.
- The plaintiff should give particulars of his claim against the defendant, stating the ground of his claim and the amount thereof, and fairly stating the points made against it by the defendant.
- *The plaintiff should give some grounds for believing that the defendants have assets in the jurisdiction.
- The plaintiff should give some grounds for believing that there is risk of the assets being removed before the judgment or award is satisfied.
- The plaintiff must give an undertaking as to damages.
*More recently, in SFC Litigation Trust (Trustee of) v. Chan, 2017 ONSC 1815, the court took a more flexible approach. The court found that a Mareva injunction can be granted even if the defendant does not have assets in the jurisdiction.
A Mareva injunction operates in personam, meaning the injunction is directed toward the respondent in person and not to the respondent’s assets.
Leading Cases:
- Mareva Compania Naviera SA v International Bulkcarriers SA (1975), 2 Lloyd's Rep. 509
- Aetna Financial Services Ltd. v. Feigelman, 1985 1 SCR 2
- R v Consolidated Fastfrate Transport Inc., 1995 CanLII 1527 (ON CA)
- SFC Litigation Trust (Trustee of) v. Chan, 2017 ONSC 1815
Model Orders
Summary
An Anton Piller order is sometimes called a “civil search warrant”. The order gives the moving party the right to attend at the respondent’s location unannounced to search for and seize evidence. It is granted where, contrary to the general obligation of all parties to disclose all relevant evidence, there is a real risk that evidence will not be provided or will be destroyed by the respondent.
An Anton Piller order is meant to preserve evidence, not to enable a “fishing expedition”.
Anton Piller orders are increasingly being sought due to the relative ease of destroying or moving data in an electronic world.
As with all ex parte orders, the usual ethical obligations of full and frank disclosure apply.
The name comes from a decision of the English Court of Appeal in Anton Piller K.G. v. Manufacturing Processes Ltd., [1976] Ch. 55 (C.A.).
Legal Requirements
The criteria for granting an Anton Piller order are:
- The plaintiff demonstrates a strong prima facie case,
- The defendant’s alleged misconduct is very serious,
- There is clear and convincing evidence that the defendant possesses incriminating documents,
- There is a real possibility that the defendant may destroy the incriminating documents
The plaintiff should provide an undertaking to pay damages in the event the order is unwarranted or wrongfully executed.
In Celanese Canada v. Murray Demolition Corp., 2006 SCC 36, at para 40, the Supreme Court of Canada provided additional guidance about the preparation of the order. The order should do the following:
- Appoint an independent supervising solicitor (ISS) as a neutral officer of the court to explain the order to the defendant, supervise the search, and provide an objective report to the court.
- Be no wider than necessary, and clear about technical or financial evidence, including the form (electronic, physical) of the expected evidence.
- Set out the procedure for dealing with solicitor-client privilege or other confidential materials.
- Limit the use of the seized items to use in the pending litigation.
- State that materials seized should be returned as soon as practicable.
- Require the search to occur during normal business hours when counsel for the defendant is available for consultation.
- Name the persons to conduct the search.
- State that the responsibilities of the supervising solicitor continue beyond the search itself
Leading Cases:
- Anton Piller KG v. Manufacturing Process Ltd. [1976] Ch 55 1 ALL E.R. 779.
- Celanese Canada v. Murray Demolition Corp., 2006 SCC 36.
- Catalyst Partners Inc. v. Meridian Packaging Ltd., 2007 ABCA 201.
Model Orders
Summary
A Norwich order allows a potential plaintiff to obtain evidence from a third party for the purposes of deciding whether to start a lawsuit. It is a pre-action mechanism, occurring even before a statement of claim is issued. The order compels the third party to preserve and provide evidence to the potential plaintiff. This discretionary remedy is used when critical information is unknown to the potential plaintiff, and the information is necessary to determine whether to commence litigation.
Legal Requirements
The test for obtaining a Norwich order was established in Alberta (Treasury Branches) v Leahy, 2000 ABQB 575, at para 106, and affirmed in 2002 ABCA 101. To obtain a Norwich order, the person seeking the order must demonstrate:
- a bona fide claim,
- the third party is in some way involved in the disputed matter,
- the third party is the only practical source of information,
- *the third party will be reasonably compensated for their legal costs and the expense of complying with the order, and
- the public interests favouring disclosure outweigh the legitimate privacy concerns.
As with all ex parte orders, the usual ethical obligations of full and frank disclosure apply.
*Copyright holders often seek Norwich orders against internet service providers. In complying with the Norwich order, the provider’s tasks often overlap with the provider’s obligations under the Copyright Act’s “notice and notice” regime. Under the copyright regime, the provider bears the cost, but under the Norwich order the copyright holder bears the cost. In Rogers Communications Inc. v. Voltage Pictures, LLC, 2018 SCC 38 the Supreme Court of Canada clarified that the following implied obligations fall under the copyright regime and the associated costs are not recoverable under the Norwich order:
- determining, for the purposes of forwarding notice electronically, who was assigned the impugned IP address at the time of the alleged infringement.
- taking all steps necessary to verify the internet service provider has done so accurately; and
- taking all steps necessary to verify the accuracy of records that would permit the internet service provider to identify the name and physical address of the person to whom notice was forwarded.
Leading Cases:
- Alberta (Treasury Branches) v Leahy, 2000 ABQB 575, at para 106, aff’d in 2002 ABCA 101
- Rogers Communications Inc. v. Voltage Pictures, LLC, 2018 SCC 38
PS-041
Injunctions Fundamentals
An injunction is an equitable remedy. Most injunctions are temporary pre-trial injunctions. But they can also be granted as permanent post-trial relief.
An injunction can be either prohibitive or mandatory.
A prohibitive injunction prohibits a party from taking certain actions. Prohibitive injunctions are the norm.
A mandatory injunction requires a party to take certain positive actions. Mandatory injunctions are rare.
Click a heading below to learn more.

An interlocutory injunction is a pre-trial injunction that usually remains in force until the final disposition of the case. It is thoroughly argued by both sides.
An interim injunction is a pre-trial injunction often sought on an ex parte basis with limited argument. It provides short-term relief until the judge can hear full argument on an interlocutory injunction. The applicant must typically show some urgency.
A quia timet injunction prevents anticipated harm that is about to occur, as opposed to preventing the continuation or repetition of an existing harm.
For a brief explanation of common injunctions, see 1711811 Ontario Ltd. (AdLine) v. Buckley Insurance Brokers Ltd., 2014 ONCA 125, at paras 49-59.
The following specialized injunctions have unique applications and legal tests (see the lesson on specialized injunctions to learn more):
- Anton Piller orders
- Mareva injunctions
- Norwich orders
The leading case for pre-trial injunctions continues to be RJR-MacDonald Inc v Canada (Attorney General), [1994] 1 SCR 311. This case sets out a 3-part test that applies to both interlocutory and interim injunctions:
- There is a serious issue to be tried.
This is a low threshold. Extensive examination of the merits is not undertaken. Once the application is not frivolous or vexatious, the judge proceeds to the rest of the test.
Ask yourself: “Is the underlying application frivolous or vexatious?”
-
Irreparable harm will result if the injunction is not granted.
Judges should take a broad view of irreparable harm. This is harm which cannot be quantified in monetary terms or harm that cannot be cured. Examples include putting a party out of business or preventing a party from earning a livelihood.
Ask yourself: “Would monetary damages be an inadequate remedy if the plaintiff succeeds?”
- The balance of convenience favours granting the injunction.
The balancing is case dependent. Most injunctions turn on this issue. The analysis should be evidence based. In Charter cases, the judge should also consider the public interest. If necessary, the judge can revisit the relative strength of each party’s case to tip the balance.
Ask yourself: “Which party suffers greater harm from granting or refusing the injunction?”
A judge should not simply seek to “preserve the status quo”. In RJR-MacDonald the Supreme Court finds that such an approach has “limited value in private law” and “has no merit” in Charter cases. Rather, the judge must consider the situation under the 3-part analysis described above.
If an injunction is granted on an ex parte basis, it must be of limited duration and the moving party must typically bring a further motion to continue the injunction. The moving party must make full and frank disclosure.
Situations Requiring a Modified RJR-MacDonald Test
In the following situations, the first prong of the RJR-MacDoanld test is modified:
- A mandatory injunction requiring a party to take positive steps, or
- An injunction that effectively ends the litigation (picketing, defamation, public elections, take-over bids, and covenants restraining trade are all examples).
In these situations, at the first prong of the test the moving party must demonstrate a strong prima facie case.
See:
R. v. Canadian Broadcasting Corp., 2018 SCC 5, at para 15;
Medical Laboratory Consultants Inc. v. Calgary Health Region, 2005 ABCA 97, at para 4.
While the rest of the RJR-MacDonald test is unchanged, a finding of a strong prima facie case may impact the analysis under the second and third prongs of the RJR-MacDonald framework. The moving party is put in a stronger position. See: Toronto (City) v. A.G. Ontario, 2018 ONCA 76, at para 20.
Post-trial injunctions are usually called permanent injunctions. They are sometimes called perpetual injunctions. They form part of a final order after the parties’ rights have been fully adjudicated. The 3-part test in RJR-MacDonald does not apply.
To obtain a permanent injunction, a party is required to first establish its legal rights, and then the court must determine whether an injunction is an appropriate remedy. Irreparable harm and balance of convenience are not relevant. Permanent injunctions can be either prohibitive or mandatory.
See:
Liu v. Matrikon Inc., 2007 ABCA 310, at para 26
Cambie Surgeries Corp. v. British Columbia (Medical Services Commission), 2010 BCCA 396, at paras 27-28
1711811 Ontario Ltd. (AdLine) v. Buckley Insurance Brokers Ltd., 2014 ONCA 125, at paras 56-59.