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Acceptance in Contract Law

Sep 7, 2025

Overview

This lecture focuses on the concept of acceptance in contract law, specifically the rules and principles governing acceptance as the second component of contract agreement.

Recap: Elements of Contract Formation

  • The formation of a contract requires agreement, consideration, intention to create legal relations, and sometimes formalities such as writing.
  • Agreement is made up of an offer and acceptance.
  • Previous lessons covered offers, including distinguishing offers from invitations to treat and types of offers.

Acceptance of an Offer

  • Acceptance is the other side of agreement, requiring matching assent to the offer's terms.
  • The "mirror rule" states acceptance must exactly match the terms of the offer.
  • The objective approach is used for both identifying offers and acceptances; it considers what a reasonable person would interpret as acceptance.
  • Conduct, not just verbal or written communication, can constitute valid acceptance.

Case Study: Brogden v. Metropolitan Railway (1877)

  • Defendants supplied coal to the claimants without a formal signed contract, acting on a draft contract for two years.
  • When the suppliers stopped, claimants sued for breach of contract, though no contract was formally signed.
  • The court held acceptance was shown by the defendants' conduct (performing the contract terms), creating a binding contract.
  • Acting in accordance with a draft contract's terms can establish contractual acceptance even without formal signing.

Key Terms & Definitions

  • Offer — A proposal by one party to form a contract, which if accepted, creates a binding agreement.
  • Acceptance — Unqualified agreement to the terms of an offer, forming an agreement.
  • Mirror Rule — The rule that acceptance must exactly match the terms of the offer.
  • Objective Approach — Assessing contract formation based on what a reasonable person would believe.
  • Conduct — Actions that demonstrate agreement to contract terms, which can constitute acceptance.

Action Items / Next Steps

  • Review the concept and application of the mirror rule.
  • Read about the importance of conduct in contract acceptance.
  • Prepare to discuss additional aspects of acceptance in future lessons.