
contracts cases and commentaries 11th edition pdf
Preface to ‘Contracts: Cases and Commentaries’ 11th Edition
This eleventh edition, a leading Canadian contracts casebook for over four decades, delivers a critical survey of pivotal cases and insightful commentary.
Overview of the 11th Edition

The 11th edition of Contracts: Cases and Commentaries remains the preeminent teaching resource for Canadian contract law professors and students. This extensively revised edition builds upon a forty-year tradition, offering a comprehensive and critical analysis of key cases and evolving doctrines. It reflects significant developments from the Supreme Court of Canada since the 10th edition’s 2018 publication.
The text provides a robust foundation in contract formation, consideration, terms, and remedies. Furthermore, it incorporates introductory teachings on the interactions of Indigenous legal principles with contract law, demonstrating a commitment to contemporary legal issues. This edition ensures students are equipped with a nuanced understanding of this vital area of law.
Key Updates Since the 10th Edition (2018)
This edition reflects a period of intense doctrinal development by the Supreme Court of Canada, necessitating substantial revisions and updates. Key changes encompass recent landmark cases impacting contract law principles, particularly in areas like offer, acceptance, and remedies for breach. The commentary has been thoroughly revised to analyze these developments and their implications.
Notably, the 11th edition introduces introductory teachings concerning the intersection of Indigenous legal traditions and contract law. This addition acknowledges the growing importance of reconciliation and its impact on legal frameworks. The updates ensure the text remains current, relevant, and academically rigorous.
Authors and Contributors
Contracts: Cases and Commentaries, 11th Edition benefits from the expertise of numerous law professors across Canada, ensuring a diverse and comprehensive perspective on contract law. While a complete list requires consulting the book itself, the collaborative effort represents leading academic thought in the field.
S. Ben-Ishaid and D. Percy are central figures in this edition, building upon their established reputation in Canadian contract law scholarship. Their contributions, alongside those of other esteemed faculty, guarantee a high standard of legal analysis and pedagogical clarity. This collective authorship strengthens the book’s authority.

Table of Contents & Part 1: Formation of a Contract

Part 1 meticulously examines contract formation, covering offer, acceptance, certainty, and intention to create legal relations – foundational elements of Canadian contract law.
Canadian contract law, a cornerstone of commercial activity, governs agreements creating legally binding obligations. This edition provides a comprehensive overview, reflecting the Supreme Court of Canada’s significant doctrinal developments. It explores the fundamental principles underpinning enforceable promises, examining how courts interpret and apply contractual rules.
The text delves into the historical evolution of contract law within the Canadian legal system, highlighting key influences and contemporary challenges. Students will gain insight into the interplay between common law principles and statutory interventions, crucial for navigating real-world contractual scenarios. This introduction sets the stage for a detailed exploration of formation, consideration, terms, and remedies.
The Nature of Contractual Obligations
Contractual obligations represent promises legally enforced by courts. This section examines the core principles defining these obligations, exploring their distinctiveness from moral or social commitments. We analyze the foundational elements – offer, acceptance, consideration, and intention – necessary for creating a binding agreement.
The discussion extends to the scope of contractual duties, differentiating between primary obligations (to perform the contract) and secondary obligations (arising from breach). Understanding these nuances is vital for assessing liability and available remedies. This edition emphasizes the evolving judicial interpretation of these principles within the Canadian context, drawing from key case law.
Offer
A fundamental element of contract formation, an offer signifies a clear expression of willingness to enter into a bargain on specified terms. This section delves into the requirements for a valid offer, distinguishing it from preliminary negotiations or mere inquiries. We explore the objective test applied by courts to determine intent, focusing on how a reasonable person would perceive the communication.
Crucially, we analyze the distinction between offers and ‘invitations to treat’ – invitations to negotiate, lacking the requisite commitment. Landmark Canadian cases illustrate these principles, providing practical guidance for identifying legally enforceable offers and initiating the contractual process.
Defining a Valid Offer
A valid offer, essential for contract formation, must demonstrate a present intention to be bound by specific terms. It requires clear, definite, and complete proposals communicated to an offeree. Ambiguous or preliminary statements generally don’t qualify. The objective manifestation of intent is paramount; courts assess how a reasonable person would interpret the offeror’s words and conduct.
This section examines key criteria, including the necessity of communicating the offer to the intended recipient. We analyze cases illustrating the difference between genuine offers and mere expressions of interest, highlighting the importance of precise language and demonstrable commitment.
Distinguishing Offers from Invitations to Treat
Crucially, not all expressions of willingness to engage in a transaction constitute legally binding offers. Invitations to treat – preliminary communications inviting others to make an offer – lack the requisite intention to be immediately bound. Common examples include advertisements, displays of goods with prices, and auctions.
This distinction is vital. Courts analyze whether the communication signals a willingness to be bound upon acceptance, or merely initiates negotiations. Understanding this difference prevents unintended contractual obligations, ensuring clarity in commercial interactions. Cases illustrate how context determines classification.
Acceptance
Acceptance forms the cornerstone of contract formation, representing the unequivocal assent to an offer’s terms. This assent must mirror the offer precisely – the “mirror image rule” – without introducing new conditions. Any variation constitutes a counter-offer, terminating the original offer.
Effective acceptance requires communication to the offeror, though exceptions exist, like the postal rule. Determining the moment of acceptance is critical, especially in modern communication. Courts analyze these factors to establish a binding agreement, ensuring both parties understand their obligations.
Rules of Acceptance
Several key rules govern valid acceptance. Firstly, acceptance must be absolute and unqualified, mirroring the offer’s terms exactly. Secondly, communication of acceptance is generally required; silence doesn’t equate to consent, barring prior agreement. The ‘postal rule’ presents an exception, deeming acceptance effective upon dispatch, not receipt.
Furthermore, acceptance must be made in a prescribed manner, if specified by the offeror. Instantaneous communication methods, like email, pose unique challenges regarding the moment of acceptance, often determined by the offeror’s location.
Communication of Acceptance
Effective communication of acceptance is crucial for contract formation. Generally, acceptance must be actively communicated to the offeror. However, the ‘postal rule’ introduces a notable exception: acceptance is effective when dispatched via post, even if never received. This rule doesn’t apply to instantaneous methods like email or fax.
Determining the precise moment of acceptance with modern communication is complex. Courts consider factors like the offeror’s reasonable expectations and the reliability of the communication method. Silence typically doesn’t constitute acceptance, unless a prior course of dealing suggests otherwise.
Certainty of Terms
For a contract to be enforceable, its terms must be certain and complete. Agreements suffering from vagueness or ambiguity are often deemed unenforceable, as courts struggle to determine the parties’ intentions. Essential terms – price, subject matter, quantity – require a reasonable degree of clarity.
Incomplete agreements, where crucial aspects are left unresolved, also face challenges. Courts may attempt to imply missing terms, but only if it’s possible to do so with reasonable certainty. The goal is to ascertain and enforce the parties’ objective intentions, avoiding speculation.
Vagueness and Ambiguity
Contractual terms lacking sufficient clarity, either through inherent vagueness or multiple possible interpretations (ambiguity), pose significant enforceability issues. A term is vague if its meaning is imprecise or lacks a discernible standard. Ambiguity arises when a term is susceptible to more than one reasonable interpretation.
Courts generally avoid enforcing vague agreements, as they cannot reliably determine the parties’ obligations. Similarly, ambiguous terms are construed against the party who drafted the contract; The presence of either vagueness or ambiguity can render a contract, or specific provisions within it, unenforceable.
Completeness of Agreement
A complete agreement signifies that all essential terms necessary for a binding contract have been definitively agreed upon by all parties involved. Missing crucial elements, such as price, subject matter, or quantity, can render the agreement incomplete and therefore unenforceable. Courts require a sufficient degree of certainty regarding these fundamental aspects.
The doctrine of completeness is closely linked to certainty; both ensure the court can ascertain the parties’ intentions. An incomplete agreement leaves too much room for speculation and potential disputes, hindering judicial enforceability. Parties must strive for clarity and exhaustiveness in their contractual terms.
Intention to Create Legal Relations
Establishing intention to create legal relations is crucial for contract formation, determining whether parties intended their agreement to be legally binding. This is generally presumed in commercial contexts, where agreements are routinely entered into with the expectation of enforceability. However, this presumption can be rebutted with clear evidence to the contrary.
Conversely, in social or domestic arrangements – agreements between family or friends – the presumption is reversed. Courts require compelling evidence of a serious intent to be legally bound, recognizing the informal nature of these relationships. This distinction highlights the importance of context in assessing contractual intent.
Commercial Agreements
In the realm of commercial agreements, Canadian courts generally presume a strong intention to create legal relations. This stems from the understanding that businesses routinely enter into transactions expecting enforceability, fostering confidence in commercial dealings. This presumption simplifies contract formation, avoiding unnecessary scrutiny of subjective intentions.
However, this isn’t absolute. Parties can explicitly exclude legal consequences through “honour clauses” or similar provisions, demonstrating a lack of intent. Courts will carefully examine the language and surrounding circumstances to ascertain the true intention, ensuring fairness and preventing unintended obligations.

Social and Domestic Agreements
Conversely, social and domestic agreements – those between family members or friends – are generally presumed not to be legally binding. This presumption acknowledges the unique nature of these relationships, where reliance on formal legal enforcement might be inappropriate or undesirable. Courts recognize that promises made within these contexts often lack the seriousness of intent required for a contract.
However, this presumption can be rebutted with clear evidence demonstrating a mutual intention to create legal relations, such as significant financial stakes or formal documentation. The burden of proof lies with the party asserting enforceability.

Part 2: Consideration & Related Doctrines
This section delves into the essential doctrine of consideration, examining its sufficiency, the implications of past consideration, and existing legal duties.

Consideration: The Basic Principle
Consideration forms a cornerstone of contract law, representing the price for a promise. It signifies what each party exchanges as inducement to enter the agreement. This principle dictates that a promise is generally unenforceable without consideration, ensuring reciprocity and preventing gratuitous promises from being legally binding.
The text explores the fundamental requirements of consideration, analyzing its role in establishing a valid and enforceable contract. It examines how courts assess whether something of value has been exchanged, moving beyond merely nominal or illusory consideration. Understanding this basic principle is crucial for navigating the complexities of contractual obligations within the Canadian legal framework.
Sufficiency of Consideration
While consideration must be ‘sufficient’ in the eyes of the law, it need not be ‘adequate’ – meaning courts don’t typically assess whether the exchange represents fair market value. This principle allows for freedom of contract, even if one party receives a seemingly better deal. However, the consideration must be real, not illusory, and not involve performing an existing legal duty.
The text delves into cases illustrating what constitutes sufficient consideration, distinguishing it from inadequate bargains. It analyzes scenarios where nominal consideration is challenged and explores the boundaries of acceptable exchange. Understanding sufficiency is vital for determining the enforceability of agreements, particularly when assessing the value exchanged by each party.
Past Consideration
The doctrine of past consideration dictates that an act done before a promise is made generally doesn’t constitute valid consideration for that promise. Essentially, a promise made in return for something already completed isn’t legally binding. This prevents parties from attempting to retroactively create contractual obligations based on prior actions without a pre-existing agreement.
However, the text explores exceptions to this rule, such as situations where the past act was done at the promisor’s request and with an understanding of potential future remuneration. It analyzes landmark cases clarifying the nuances of past consideration, demonstrating when courts might enforce promises despite the lack of contemporaneous exchange.
Existing Legal Duty
Performing an existing legal duty doesn’t typically qualify as sufficient consideration for a new promise. This principle prevents parties from demanding extra payment simply for fulfilling obligations they were already legally bound to undertake. Whether the duty is public (owed to society) or contractual (owed to a specific party), it generally doesn’t support a new contract.
However, the text delves into exceptions, notably the practical benefit doctrine established in Williams v Roffey Bros. This allows enforcement of promises to pay more if the promisor receives a demonstrable practical benefit from the promisee’s continued performance, even if it’s merely fulfilling an existing duty.

Part 3: Contractual Terms & Interpretation

This section examines how courts determine the meaning of contractual language, covering express and implied terms, and the modern approach to interpretation.
Express Terms
Express terms are those explicitly stated by the parties, either orally or in writing, forming the foundation of the agreement. Contracts: Cases and Commentaries, 11th edition, meticulously analyzes how courts identify and enforce these terms. The text delves into the complexities of incorporating terms, examining scenarios where written contracts supersede prior oral agreements.
Furthermore, it explores the significance of signatures and the impact of entire agreement clauses, which aim to limit reliance on pre-contractual representations. The book provides a comprehensive overview of the rules governing the interpretation of express terms, ensuring clarity and predictability in contractual obligations. Case law illustrates the practical application of these principles.
Implied Terms
Contracts: Cases and Commentaries, 11th edition, dedicates significant attention to implied terms – those not explicitly stated but understood by the parties or imposed by law. The text distinguishes between terms implied in fact, based on the presumed intentions of the parties, and those implied by law, arising from custom, usage, or legal policy.
It examines the rigorous tests courts employ to determine whether an implied term should be recognized, emphasizing the necessity of business efficacy and obviousness. The book explores the implications of implied terms relating to quality, fitness for purpose, and reasonable care, providing a nuanced understanding of their role in contract interpretation and enforcement.
Interpretation of Contracts
The 11th edition of Contracts: Cases and Commentaries provides a comprehensive analysis of contractual interpretation, reflecting the modern approach favored by Canadian courts. It details the shift away from a purely literal reading of contract language towards a contextual analysis considering the surrounding circumstances and the objective intentions of the parties.
The text thoroughly examines the admissibility of extrinsic evidence – information outside the contract itself – in determining contractual meaning, outlining the limitations and exceptions to this rule; It explores how courts navigate ambiguity and resolve disputes arising from conflicting interpretations, ensuring a practical and legally sound approach.
The Modern Approach to Interpretation
Contracts: Cases and Commentaries, 11th edition, elucidates the modern approach to interpreting contracts, moving beyond a strict textualism. This methodology prioritizes determining the objective meaning a reasonable person would attribute to the agreement, considering the context and purpose. The book details how courts now favor a purposive interpretation, seeking to give effect to the overall commercial scheme.
It highlights the importance of considering all relevant surrounding circumstances, including pre-contractual negotiations and post-contractual conduct, to ascertain the parties’ intentions. This approach, extensively developed by the Supreme Court of Canada, is thoroughly examined with illustrative case examples.
Extrinsic Evidence
Contracts: Cases and Commentaries, 11th edition, comprehensively explores the admissibility of extrinsic evidence in contract interpretation. While the parol evidence rule traditionally limited such evidence, the modern approach, as detailed in the text, allows for its consideration to clarify ambiguity or determine the underlying commercial purpose.
The book analyzes how courts balance the principle of preserving the written agreement with the need to understand the parties’ true intentions. It examines cases where extrinsic evidence – including pre-contractual negotiations and subsequent conduct – has been admitted to resolve contractual disputes, providing a nuanced understanding of this complex area.

Part 4: Remedies for Breach of Contract
This section details remedies available when contracts are breached, including damages, specific performance, and injunctions, as analyzed within the 11th edition.
Damages
The eleventh edition of Contracts: Cases and Commentaries thoroughly examines the principles governing contractual damages in Canadian law. It explores the foundational aim of damages – to compensate the injured party for losses stemming from the breach. This includes an in-depth analysis of expectation damages, reliance damages, and restitutionary damages, alongside discussions on remoteness and mitigation.
The text critically surveys key cases shaping the understanding of damage assessment, reflecting the Supreme Court of Canada’s recent doctrinal developments. Students will gain a comprehensive grasp of how courts determine the appropriate quantum of damages, considering factors like foreseeability and the duty to minimize losses.
Specific Performance
Contracts: Cases and Commentaries, 11th edition, provides a detailed exploration of specific performance as a remedy for breach of contract under Canadian law. It clarifies when courts will compel a breaching party to fulfill their contractual obligations, rather than awarding monetary damages. The text analyzes the circumstances where specific performance is appropriate, particularly concerning contracts involving unique goods or land.
This edition critically examines relevant case law, showcasing the discretionary nature of this remedy and the factors influencing a court’s decision. Students will understand the limitations of specific performance, including considerations of hardship and impossibility of enforcement, as developed by the Supreme Court of Canada.
Injunctions
The 11th edition of Contracts: Cases and Commentaries thoroughly investigates injunctions as a crucial equitable remedy for contractual breaches within the Canadian legal framework. It details how courts may issue orders prohibiting a party from performing an act that would violate a contract, or compelling them to continue a specific course of action.
This edition analyzes the different types of injunctions – mandatory and prohibitory – and the principles governing their availability. Students will gain insight into the conditions required for obtaining an injunction, including demonstrating irreparable harm and the balance of convenience, as illustrated through key Supreme Court of Canada cases.