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Calgary, AB · 2026-09-24

Freezing Assets in an Alberta Lawsuit: What a Mareva Injunction Is and When Courts Grant One

Freezing Assets: illustrated cover for a LawDB guide about Calgary, Alberta
Bennett Jones published a June 2025 article titled “Mareva Injunctions in Canada: Now Easier to Get?”. This guide is our own plain-language explainer and does not reproduce that article.

Winning a judgment does not help much if the defendant has moved the money by the time you get it. A Mareva injunction is the court’s answer to that problem: an order that stops a defendant from disposing of or hiding assets while a lawsuit is under way.

What a Mareva injunction does

The order is named after an English case from the 1970s and is now a standard tool in Canadian courts, including the Court of King’s Bench of Alberta. It usually restrains the defendant from dealing with specified assets, or with assets up to a stated value, until the case is decided or the court orders otherwise. It does not give the claimant ownership of anything or a priority over other creditors.

Orders can be narrow, covering a single account or property, or broad. Courts can also order a defendant to disclose what assets they hold so the freeze can be policed. In some cases the order reaches assets held outside the province or the country.

What a court generally needs to see

In Canada the leading test comes from the Supreme Court of Canada’s Aetna Financial Services v. Feigelman decision. In outline, the applicant must show a strong case on the merits, that the defendant has assets in the jurisdiction, that there is a real risk those assets will be removed or dissipated to defeat a judgment, and that the balance of convenience favours the order.

Because these applications are often made without notice to the defendant, the applicant has a duty of full and frank disclosure. Leaving out unhelpful facts can lead to the order being set aside. Applicants are normally also asked to give an undertaking to compensate the defendant if the freeze turns out to have been unjustified.

Risks and practical points

A freeze can damage a business, so courts do not grant one on suspicion alone. Evidence of actual steps, such as transfers to relatives or sudden sales below value, carries far more weight than a general worry. Costs can be high and an unsuccessful application can be expensive.

If you are on the receiving end, an order does not mean you cannot pay ordinary living or business expenses. Orders commonly include carve-outs for these, and you can apply to vary the order.

If you think assets are being moved

Firm spotlight: Bennett Jones LLP

Bennett Jones was founded in Calgary in 1922 and says it has been part of the city’s business life for more than a century. Its early history is tied to R.B. Bennett, who went on to become Canada’s 11th prime minister, and the firm remains the principal legal advisor to the Calgary Stampede. See the full Bennett Jones LLP profile. Read more from Bennett Jones’ Calgary office.

Frequently asked questions

What is a Mareva injunction?

It is a court order that freezes a defendant’s assets before judgment so they cannot be moved or dissipated to defeat a claim.

Can a Mareva injunction be granted without telling the other side?

Yes, in urgent cases a court may hear the application without notice, but the applicant must then give full and frank disclosure and the defendant can apply to set the order aside.

Does a freeze mean the defendant has lost the case?

No. It is a temporary protective step. The lawsuit still has to be decided on its merits.

Who pays if the freeze was unjustified?

Applicants are normally required to give an undertaking to compensate the defendant for losses caused by an order that should not have been made.

Should I speak to a lawyer straight away?

Yes. These applications turn on evidence and timing, so a lawyer should look at your situation as soon as you have concerns about assets disappearing.

Alberta firms to look at

Bennett Jones LLP★ 4.2 (26)Hoare Claxton Criminal Defence★ 5.0 (27)Cuming & Gillespie LLP★ 4.7 (80)McCarthy Tétrault LLP★ 4.6 (12)

See all Calgary law firms · All Alberta law firms

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General information for readers in Alberta, not legal advice for any specific situation. Laws, thresholds and deadlines change, so confirm current rules with a lawyer before relying on anything above. LawDB is an independent directory and is not affiliated with Bennett Jones LLP; firm details come from the firm’s own published descriptions and public listings.