Chapter 10
MUTUAL ASSENT
I. Offer 3. Rejection
A. Essentials of an Offer 4. Counteroffer
1. Communication 5. Death or Incompetency
2. Intent 6. Destruction of Subject Matter
a. Preliminary Negotiations 7. Subsequent Illegality
b. Advertisements II. Acceptance of Offer
c. Auction Sales A. Communication of Acceptance
3. Definiteness 1. General Rule
a. Open Terms 2. Silence as Acceptance
b. Output and Requirements Contracts 3. Effective Moment
B. Duration of Offers a. Stipulated Provisions in the Offer
1. Lapse of Time b. Authorized Means
2. Revocation c. Unauthorized Means
a. Option Contracts d. Acceptance Following a Prior Rejection
b. Firm Offers Under the Code B. Variant Acceptances
c. Statutory Irrevocability 1. Common Law
d. Irrevocable Offers of Unilateral Contracts 2. Code
e. Promissory Estoppel
Cases in This Chapter
Catamount Slate Products, Inc. v. Sheldon
Lefkowitz v. Great Minneapolis Surplus Store, Inc.
Osprey L.L.C. v. Kelly-Moore Paint Co., Inc.
Sherrod v. Kidd
Chapter Outcomes
After reading and studying this chapter, the student should be able to:
Identify the three essentials of an offer and explain briefly the requirements associated with each.
State the seven ways by which an offer may be terminated other than by acceptance.
Compare the traditional and modern theories of definiteness of acceptance of an offer, as shown by the
common law “mirror image” rule and by the rule of the Uniform Commercial Code.
Describe the five situations limiting an offeror’s right to revoke her offer.
Explain the various rules that determine when an acceptance takes effect.
TEACHING NOTES
I. OFFER
Four elements — competent parties, legal subject matter, consideration, and
mutual assent — are essential to a contract; mutual assent is often viewed to be
the core requirement. Mutual assent is usually made through an offer and an
acceptance. One party proposes an offer to another party who, in turn, accepts
the offer. Both the offer and the acceptance generally can take the form of
either words or conduct. Thus, even if there is no de$nite spoken or written offer
or acceptance, but there is some action by both parties which indicates that they
recognize the agreement, it can be a legal contract.