Executive Summary: Key Legal and Evidentiary Issues

• Res judicata (chose jugée) bars a second lawsuit seeking to undo the same share sale and hypothecs already validated by a prior 2022 judgment between the same parties.
• The plaintiffs’ new claim for annulment based on dol, error and latent defect rests on the same factual matrix and contract as their earlier defensive allegations in the 2022 proceedings.
• Contamination of the bakery’s immovable by hydrocarbons, allegedly tied to an oil tank, is central to both the valuation dispute and the alleged vitiation of consent.
• The defendants’ hypothecary rights (immovable and movable) were already enforced by forced surrender and sale under judicial control, making a later request to cancel those hypothecs incompatible with the prior judgment.
• The court finds prescription has run because the plaintiffs knew of the contamination and invoked it judicially in July 2022, yet only filed their annulment action in October 2025.
• Procedurally, the plaintiffs are prevented from re-litigating arguments and grounds—such as error— that could and should have been advanced in the earlier action instead of allowing default judgment to be rendered.

Factual background and the sale of shares

Boulangerie Lajoie ltée operated a bakery in an immovable that constituted the principal asset underlying its value. On 1 May 2020, a contract for the sale of shares was concluded, whereby Sylvie Lajoie and Pierre Lajoie sold the shares in the capital stock of Boulangerie Lajoie ltée to purchasers including Phillip Dufour. The value of the immovable was presented and understood as the main driver of the transaction’s economic worth, making its condition and market value central to the pricing of the shares. The sale was documented in a written share purchase agreement (contrat de vente d’actions), with additional security taken in the form of immovable and movable hypothecs in favour of the sellers to secure payment of the sale price and related obligations.

Emergence of environmental contamination and ensuing dispute

In November 2021, hydrocarbons were discovered in the soil of the property where the bakery was operated. The contamination was said to be linked to the presence of an oil tank on the premises. According to the purchasers, this contamination severely affected the value of the immovable, ultimately leading to a drop of more than 84% of its value after a sale under judicial control. They asserted that this environmental issue was unknown to them at the time of the 2020 share sale and that, had they been aware of it, they would not have entered into the transaction on the same terms, if at all. From their perspective, the sellers had made contractual representations and guarantees, and had also provided verbal assurances, that were inconsistent with a property burdened by serious contamination.

The 2022 proceedings: enforcement of price and hypothecs

On 5 January 2022, Sylvie Lajoie and Pierre Lajoie initiated proceedings against Boulangerie Lajoie ltée and Phillip Dufour based on the 1 May 2020 share sale contract. In that action, the sellers sought recovery of the unpaid portion of the sale price of the shares and an adjustment to the price, claiming a balance of 182,486.56 $ and a further 49,759.69 $ as a price adjustment. They also relied on their immovable and movable hypothecs, requesting forced surrender (délaissement forcé) and sale under judicial control (vente sous contrôle de justice) of the immovable where the bakery was operated and the hypothecated movable property. In July 2022, Boulangerie Lajoie ltée and Phillip Dufour filed a summary defence outline. In that defence, they alleged that the November 2021 discovery of hydrocarbons in the soil rendered the property contaminated, that this situation contradicted the contractual representations and guarantees and verbal statements made by the sellers, and that the purchaser’s consent had been vitiated by reticence and inexact representations. They went so far as to ask that the sale price be reduced by an amount equivalent to the decontamination costs and that the sellers’ claim be declared extinguished. Despite articulating these defences, the purchasers did not pursue them to judgment. On 22 November 2022, the Superior Court rendered judgment, granting the sellers’ claim. The court condemned Boulangerie Lajoie ltée and Phillip Dufour to pay the claimed amounts of 182,486.56 $ and 49,759.69 $ for the balance and adjustment of the share price and allowed the hypothecary recourses, including forced surrender and sale under judicial control of the immovable and hypothecated movables. Phillip Dufour consented to that judgment, and no appeal or motion to set it aside was brought. The judgment thereby confirmed the validity and enforceability of the share sale, the suretyship obligations and the hypothecary securities.

The 2025 action: attempt to annul the sale and unwind securities

On 15 October 2025, Boulangerie Lajoie ltée and Phillip Dufour commenced a new action against Sylvie Lajoie and Pierre Lajoie. In this later proceeding, the plaintiffs sought the annulment of the 1 May 2020 share sale for dol (fraudulent misrepresentation or concealment) and error and also invoked breach of the warranty against latent defects (vice caché). They alleged that the contamination of the immovable caused by an oil tank was a latent defect and that the sellers could not have been unaware of the situation. They contended that the sellers’ silence or reticence about the contamination, combined with the prior contractual and verbal assurances, constituted dol by concealment, and that they would never have entered into the transaction had they known of the true condition and value of the property. The plaintiffs argued that their error related to the principal consideration of the share sale—namely, the value of the immovable—and that the contamination had led to an extraordinary reduction in the property’s value following the court-supervised sale. On this basis, they requested annulment of the share sale contract, restitution of the prestations, a declaration that the sellers were once again owners of the shares, condemnation of the sellers to pay 87,255.57 $ plus interest, and cancellation of the immovable hypothec registered on 22 May 2020 and the movable hypothec registered on 25 May 2022. Effectively, the plaintiffs were seeking to unwind the transaction and nullify the very securities previously enforced in the 2022 judgment.

Absence of insurance policy terms

Although the case involves contamination and a significant drop in property value, the decision as provided does not discuss any insurance contract, policy wording or specific clauses of an insurance policy. The legal debate centers on civil and commercial issues—sale of shares, latent defects, dol, error, hypothecs, res judicata and prescription—rather than coverage, exclusions or conditions under an insurance policy. Accordingly, there are no policy terms or insurance clauses at issue discussed in the text of this judgment.

Application of res judicata (chose jugée) and identity of cause and object

In dealing with the defendants’ motion to dismiss (demande en irrecevabilité), the court began from the statutory framework. Under article 168 of the Code of Civil Procedure, a party may seek dismissal of a claim on the basis of res judicata (chose jugée). Article 2848 of the Civil Code of Québec defines the authority of res judicata as an absolute and irrebuttable presumption that arises when what is claimed has already been the subject of a judgment, provided that the new demand is based on the same cause, is between the same parties acting in the same capacities, and concerns the same thing. The judge emphasized that res judicata serves to prevent parties from re-litigating matters previously decided, in the interests of legal stability and the avoidance of endless, contradictory proceedings. In this case, the identity of parties was obvious and uncontested: Boulangerie Lajoie ltée and Phillip Dufour on one side, Sylvie and Pierre Lajoie on the other, acting in the same capacities as in 2022. Turning to the identity of object and cause, the court noted that the 2022 proceeding was based on the same share sale contract as the present action and that, already in July 2022, the purchasers had raised contamination, alleged vitiated consent and sought a reduction in the sale price and extinction of the sellers’ claim. The environmental facts and the contractual framework were thus squarely before the court in the earlier case. The new action sought annulment of the same contract of sale of shares and cancellation of the same hypothecs that had been recognized and enforced in 2022. The court stressed that the plaintiffs were effectively re-asserting, in a more elaborate way, the same factual and legal grievances they had announced but ultimately allowed to fall away when they consented to or did not oppose the 2022 judgment. Accepting the new action would expose a later judge to the risk of contradicting the 22 November 2022 judgment by annulling a contract whose effects had already been judicially recognized and by cancelling securities already enforced by forced surrender and judicial sale. The court also underscored that the concept of “cause” in res judicata is not confined narrowly to the precise legal grounds invoked, but includes the overall set of facts giving rise to the disputed right. It therefore rejected the idea that adding “error” as a new legal label could escape the binding effect of the prior judgment.

Finding of prescription and time-bar of the new claim

In addition to res judicata, the court upheld a second ground of irrecevability: prescription. The plaintiffs themselves had, by July 2022, pleaded contamination of the immovable and asserted that their consent to the share sale was vitiated. By doing so, they demonstrated that they then possessed all the factual elements necessary to exercise any civil remedy tied to alleged dol, error or latent defect arising from the contamination. The court treated 13 July 2022 as, at minimum, the date from which prescription began to run. Given that the new action seeking annulment and related remedies was only instituted on 17 October 2025, more than three years later, the claim was found to be prescribed under the applicable three-year limitation period in article 2925 of the Civil Code of Québec. The plaintiffs could not, after the fact, attempt to undo a final, unappealed judgment by raising arguments of law or fact that should have been advanced before that earlier judgment was rendered.

Final outcome and monetary consequences

The Superior Court concluded that the plaintiffs’ introductory motion was founded on the same cause, between the same parties in the same capacities, and concerned the same object as the 2022 case, thereby triggering res judicata. It also found the claim to be time-barred by prescription. As a result, the court allowed the defendants’ motion, declared the new action irreceivable and awarded judicial costs against the plaintiffs. Substantively, the earlier 22 November 2022 judgment remains in full force, condemning Boulangerie Lajoie ltée and Phillip Dufour to pay Sylvie Lajoie and Pierre Lajoie a total of 232,246.25 $ (being 182,486.56 $ in balance of sale price and 49,759.69 $ as price adjustment), in addition to unquantified judicial costs associated with both the 2022 merits judgment and this 2026 dismissal. The successful parties across the litigation, as reflected in this decision, are therefore Sylvie Lajoie and Pierre Lajoie, and while the principal monetary award of 232,246.25 $ is fixed in the earlier judgment, the precise total of all costs and ancillary amounts cannot be determined from the text provided.