Terms — express and implied

Week 4 moves from contract formation to contractual content. Weeks 1 to 3 asked whether there is an agreement capable of legal enforcement: offer and acceptance, certainty and intention, consideration and promissory estoppel. This week asks a different question: assuming that the parties are bound, what have they actually undertaken? The answer is found in the law of terms.

A contractual term is a legally operative part of the bargain. Not every statement made during negotiations is a term. Some statements are mere representations, relevant perhaps to misrepresentation, but not themselves promissory. Some documents are contractual; others are receipts, notices, tickets, websites, brochures, emails or pre-contractual explanations. Some terms are written, some oral, and some are incorporated without being read. Others are implied by law, fact, custom or statute despite never being articulated by the parties at all.

The importance of this topic in Durham first-year Contract Law is structural. It links formation to the later topics of interpretation, exclusion clauses, unfair terms, misrepresentation and breach. A student who treats terms as a list of cases will miss the underlying sequence of analysis: first identify the express terms; then decide whether a statement or document has been incorporated; then construe the terms; then ask whether additional terms may be implied; then consider statutory terms which enter the contract regardless of party drafting; finally consider the consequences of breach and any attempt to exclude or restrict liability.

The law displays a persistent tension. On one view, contract is a voluntary assumption of obligation and the courts should enforce what the parties have objectively agreed. On another, contracting occurs within practices, markets and inequalities which require judicial and legislative control. This tension explains the doctrine. The strict signature rule in L'Estrange v F Graucob protects certainty but can produce harsh results. The notice cases mitigate harshness by requiring reasonable steps to bring terms to attention before or at contracting. The term-versus-representation cases balance reliance against freedom from unintended warranty. The implication cases insist that courts do not improve bargains merely because they seem fair, yet allow necessary terms to give effect to the transaction. The statutory regimes, especially in sale of goods and consumer services, impose mandatory minimum standards irrespective of private intention.

For Durham assessment, the strongest scripts do not recite every incorporation case. They organise the answer around the relevant gateway. If the issue is a signed contract, begin with signature and then consider vitiating factors or statutory controls. If it is an unsigned document, ask timing and notice. If the issue is pre-contractual language, ask whether it was promissory by reference to importance, expertise, reliance and reduction into writing. If the issue is an omitted obligation, distinguish implication in fact, implication in law, custom and statute. This is an area in which accurate sequencing often earns more credit than ornamental citation.

The modern law of terms developed from nineteenth-century classical contract, where the central ideal was party autonomy expressed through bargain. The courts were reluctant to rescue parties from documents they had signed, terms they had accepted, or bargains they regretted. This formalism was not merely ideological; it reflected the commercial need for predictable enforcement. If a party could escape a written contract by saying that it had not been read, paper transactions would become precarious. L'Estrange v F Graucob is the emblematic twentieth-century survival of that approach.

At the same time, the common law has never been purely literal or purely voluntarist. The notice cases show a gradual judicial sensitivity to the fact that many transactions are not individually negotiated. Tickets, cloakroom receipts, railway conditions and warehouse notices generated a body of law asking not whether the customer in fact read the terms, but whether the business took reasonable steps to give notice before the contract was made. Thornton v Shoe Lane Parking modernised that reasoning for automated contracting: a party cannot introduce onerous terms after the machine has concluded the contract. Interfoto then developed the principle that unusual or onerous terms require a more prominent warning than ordinary boilerplate.

The distinction between a contractual term and a representation also has historical roots in the boundary between contract and tort-like reliance. Before statutory reform of misrepresentation, classification mattered acutely: if a statement was a term, breach gave contractual remedies; if it was a mere representation, the remedies were narrower. Courts therefore developed criteria to identify promissory intent: the importance attached to the statement, the knowledge or expertise of the maker, whether the innocent party relied on the statement, and whether the final written contract omitted it. Bannerman v White, Oscar Chess and Dick Bentley illustrate the technique, though each is fact-sensitive.

Implied terms developed along a different line. The early cases did not always distinguish cleanly between interpretation and implication. The Moorcock is often understood as the origin of implication in fact, where the court implies a term because it is necessary to make the particular transaction work. The business efficacy and officious bystander tests became canonical shorthand, but they were never free-standing invitations to fairness. Liverpool City Council v Irwin then recognised implication in law, where the court implies incidents into a class of contractual relationship rather than into one bespoke bargain. This was a crucial movement from presumed intention to legal standard-setting.

Statutory implication represents the most open form of regulation. The Sale of Goods Act 1979 and, for consumers, the Consumer Rights Act 2015 imply terms as to description, quality, fitness and services. These are not judicial guesses about party intention. They are legislative allocations of risk and standards of market conduct. For first-year study, this historical progression matters because it prevents a common error: treating all implied terms as if they arise from the same source. They do not. Some rest on the particular bargain; some on a class of relationship; some on trade usage; some on statute. Confusing these categories usually produces confused answers.

1. Identify the express terms before implying anything. The first task is evidential and classificatory: what words, documents, notices, emails, webpages or oral statements form part of the contract? Express terms may be oral, written, or partly both. A written agreement is not automatically exhaustive unless the parties intended it to be. Entire agreement clauses may assist, but they do not necessarily exclude liability for misrepresentation and are themselves subject to statutory control. In problem questions, do not leap to implied terms before exhausting the express materials.

1. A signed contractual document is ordinarily binding. The signature rule is strict: a party who signs a contractual document is bound by its terms even if unread. The core authority is L'Estrange v F Graucob. The rule protects transactional certainty. Its limits are equally important: the document must reasonably appear contractual; the signature may be affected by fraud, misrepresentation, non est factum in rare cases, or statutory controls; and the rule does not answer whether a term is unfair, excluded, incorporated by reference, or properly construed.

1. Unsigned terms require incorporation by notice, timing or course of dealing. Where the term is in an unsigned document or notice, the party relying on it must show reasonable steps to bring it to the other party's attention before or at the time the contract was made. Notice after formation is too late. The more unusual or onerous the term, the more explicit the notice required. Course of dealing may incorporate terms if the parties have contracted on the same terms with sufficient regularity and consistency. A few sporadic transactions will usually be inadequate.

The case law on terms is best learned as a set of gateways rather than a chronological list. Each authority answers a different question about contractual content.

The starting point for signed documents is L'Estrange v F Graucob. It gives the common law's clearest statement of the signature rule. Once a party signs a contractual document, that party is ordinarily bound by the written terms even if they were not read. The case is often criticised for harshness, but it remains a cornerstone of contractual certainty. It should be distinguished from cases in which the document did not appear contractual, the signature was procured by misrepresentation, or statutory controls intervene.

For unsigned documents and notices, Parker v South Eastern Railway, Thornton v Shoe Lane Parking and Interfoto operate together. Parker establishes the idea of reasonable notice. Thornton insists that notice must come before or at formation, especially in automated transactions. Interfoto adds the graduated principle that particularly onerous or unusual terms require particularly clear notice. This is not a separate doctrine of fairness; it is an incorporation rule based on the objective expectations created by the contracting process.

Bannerman v White, Oscar Chess and Dick Bentley govern the boundary between representation and term. Bannerman illustrates a statement whose importance to the transaction made it contractual. Oscar Chess shows that a statement made by a private seller without superior knowledge may not be a term. Dick Bentley shows the converse: a dealer's statement about mileage was treated as a term because the dealer was in a better position to know and the buyer relied on that expertise. These cases are not mechanical. The correct answer depends on an objective assessment of promissory intent.

The implied-terms cases require more care than is often given to them. The Moorcock is the classic business efficacy case, but it should not be cited as authority for implication whenever a term would be reasonable. Shirlaw's officious bystander test captures obviousness. BP Refinery offers a structured set of conditions, frequently treated as persuasive in English law. Liverpool City Council v Irwin is different: it is implication in law, not in fact, and concerns legal incidents of a class of relationship. Marks and Spencer v BNP Paribas is now essential. It confirms the strictness of implication and warns against treating reasonableness as sufficient.

Finally, the interpretation cases matter because many disputes about terms are really disputes about meaning. Investors Compensation Scheme, Chartbrook, Arnold v Britton and Wood v Capita show the modern balance between language, context and commercial common sense. A Durham answer should not collapse interpretation and implication. Ask first what the existing words mean; only then ask whether a missing term may be supplied.

See practice questions section below.

See further reading section below.