Restatement 
§36, Methods of Termination of the Power of Acceptance (p. 180)
Offeree’s power of acceptance 
terminated by:
  - Rejection or 
  counter-offer
 
  - Lapse of time
 
  - Revocation
 
  - Death or incapacity.
 
Restatement 
§39, Counter-Offers (Rules, p. 180)
  - Counter-offer is 
  made when you propose a substitute bargain for the original offer.
 
  - Original power of 
  acceptance is terminated by counter-offer (unless intentions are otherwise).
 
 
[Restatement §40, Time When 
Rejection of Counter-Offer Terminates the Power of Acceptance.]
Restatement 
§43, Indirect Communication of Revocation (Rules, p. 180)
Power of acceptance is terminated 
when offeror takes action inconsistent with intention to enter K and 
offeree finds out about it.
Restatement 
§59, Purported Acceptance Which Adds Qualifications (Rules, p. 181)
A reply to an offer that purports 
to accept but changes the terms is a counter-offer.
Mirror 
Image Rule
NORMILE 
v. MILLER (1985)  
P made offer on D’s home with expiration date (Offer). D made changes 
to form leaving expiration clause (Counter-offer). P did not immediately 
accept, D sold to someone else and revoked offer to P (Revocation). 
P then tried to accept counter-offer by the expiration date indicated 
on the counter-offer. No K.
  - Counter-offer was 
  not an option because no consideration
 
  
    - Did not have to 
    be held open
 
    - Offer is fully revocable 
    until fully accepted. (Restatement §36)
 
    
  - Mirror-Image 
  Rule (Restatement §59): Purported acceptance with qualifications 
  is a counter-offer
 
  
    - D’s made changes 
    so constituted counter-offer. 
 
    - Original offer was 
    thus off the table. (Restatement §39)
 
    
  - D revoked before 
  P accepted counter-offer (Restatement §43)
 
 
Option Contracts allow 
a right to accept for a certain period of time, and there is limited 
power to revoke., R2d § 25
  - option typically 
  isn’t created unless consideration is provided 
 
OFFER 
AND ACCEPTANCE – UNILATERAL CONTRACTS
Partial 
Performance is No Performance
PETTERSON v. PATTBERG (1928) 
D promised discount on mortgage payments if he paid it by a certain 
time, but before that time, D sold mortgage to someone else. P came 
to pay, D wouldn’t accept. No K
  - Partial Performance 
  is No Performance 
 
  
    - Rigid application 
    of the classical rule.
 
    
  - Offer of unilateral 
  contract may be withdrawn before performance. The offeror can revoke 
  before offeree accepts, however brief the interval of time between the 
  two acts. 
 
  - This sort of holding 
  gave rise to Restatement §45
 
Restatement 
§45, Option Contract Created by Part Performance or Tender (Rules, 
p. 181)
  - An option contract 
  is created when offeree tenders or begins invited performance.
 
  - Offeror’s duty 
  of performance is conditional on completion of performance.
 
Partial 
Performance creates an Option Contract 
COOKE v. COLDWELL BANKER 
D made offer based on commissions in March, then changed terms in 
Sept. P had already partially performed through Sept. K is enforceable.
  - Substantial performance 
  can create contract. 
 
  - P could also have 
  asserted promissory estoppel, but reliance would have ended in Sept 
  b/c upon finding out that there was a new offer, there would have been 
  no reasonable reliance.
 
  - Substantial performance 
  can create an option contract
 
  
    - D had to keep the 
    offer open for a reasonable period of time 
    to allow P to complete performance.
 
    
  - P not bound to performance. 
  Free to walk away.
 
PROMISSORY 
ESTOPPEL TO ENFORCE OFFERS
Minority 
Approach: Strict Application of Classical Contract Law
JAMES BAIRD CO. v. GIMBEL 
BROS., INC.  Linoleum subcontractor made an incorrect estimate 
and withdrew it before it was accepted. 
No K b/c offer was not accepted before it was revoked. 
  - No Bilateral K.
 
  
    - Offer indicated 
    “prompt acceptance” would occur after bid was awarded.
 
    
      - Offer was revoked 
      before this happened.
 
      
  - No Unilateral K
 
  
    - No counter promise 
    or consideration.
 
    
  - No Promissory Estoppel
 
  
    - Parties intended 
    that they both be bound.
 
    
  - No Option K
 
  
    - No evidence. You 
    don’t lightly imply an option.
 
    
  - Favorable to Subs.
 
Majority 
Approach: Promissory Estoppel
DRENNAN 
V. STAR PAVING CO. D, subcontractor, made bid that was used by 
P general contractor in a bid for a city project. D realized he underestimated 
bid and revoked offer. There was K b/c D had reason reason to expect 
P to rely on his bid and wanted him to.
  - Promissory Estoppel 
  (Restatement §90)
 
  
    - D made a promise 
    intending that P rely.
 
    - P did, in fact, 
    rely.
 
    
    - P suffered as a 
    result.
 
    
      - Prejudicial, foreseeable 
      change in position.
 
      
  - Factors favoring 
  PE application (not limited to these factors):
 
  
    - Client is governmental 
    entity – ultimate burden on taxpayers
 
    - Tight timing
 
    - General had to name 
    subs in bid
 
    - General had to post 
    10% bond
 
    
  - Limits to Contract
 
  
    - General contractors 
    can’t Bid Shop or Renegotiate after K is awarded
 
    - General contractors 
    can’t rely on subs bid if he knows, or should have known, it was erroneous
 
    - Subs can state that 
    offer is revocable (but not realistic, b/c Gen will toss)
 
    - Mere estimates don’t 
    qualify
 
    
  - Effect: Enhances 
  bargaining leverage of general contractor even more than it already 
  was.
 
  - Client’s interest 
  is behind this opinion b/c this will keep costs down for ultimate customer.
 
 
Option Contract, R2 
§ 87(2)
  - Offeror should reasonably 
  expect to induce action or forbearance before acceptance, and
 
  - Does not induce 
  such action or forbearance 
 
  - Necessary to avoid 
  injustice
 
UCC: 
FIRM OFFERS
Allows an offer to be kept 
open without consideration.
UCC 
§2-205, Firm Offers (Rules, p. 25)
Offer will be kept open without 
consideration  if:
  - An offer by a 
  merchant to buy or sell goods 
 
  - signed writing 
  that assures the offer will be kept open 
 
  - Period of irrevocability 
  may be stated and may not exceed three months
 
  - If form supplied 
  by offeree, then must be signed by the offeror.
 
 
  - Allows offeree to 
  comparison shop, make plans
 
  - Offeree more likely 
  to accept if it knows the offer will still be good
 
BATTLE 
OF THE FORMS
 
Benefits of Forms:
  - Save time and legal 
  fees: lower transaction costs
 
  - Lends predictability 
  b/c customers will know what to expect
 
  - Reduces chance of 
  error
 
  - Gives the user a 
  legal edge b/c they’ve been reviewed by lawyers
 
  - Companies have greater 
  control over contracts
 
  
    - Permits decision 
    making lower in the corporation
 
    
  - Facilitates inventory, 
  record-keeping.
 
 
Drawbacks:
  - Nobody reads them.
 
  - Everyone uses different 
  forms.
 
  - Potential bargaining 
  problem for the party who doesn’t have the form
 
Restatement 
§33, Certainty (Rules, p. 179)
  - Manifestation of 
  intention can’t be offer unless terms are reasonably certain.
 
  - Terms are reasonably 
  certain if they provide basis for breach and remedy.
 
  - If terms are left 
  open it may show there is no intent to make offer/acceptance.
 
UCC 
§2-207, Additional Terms in Acceptance or Confirmation (Rules, p. 27)
  - A timely expression 
  of acceptance operates as acceptance even when it states additional 
  or different terms, unless it is made expressly conditional 
  on assent to the new terms (in which case it is considered a counter-offer).
 
  - The additional 
  terms are proposals for addition. 
 
  
    - Between 
    merchants, they become part of K unless:
 
    
      - The original offer 
      expressly limits acceptance to its offer
 
      - They materially 
      alter the K, OR
 
      - Notification of 
      objection has already been given or is given within reasonable time.
 
      
    - (Not between 
    merchants, they must be expressly agreed to by the offeror.)
 
    
  - Conduct by parties 
  can establish a K although writings do not. T&C will be those 
  expressed in writings and UCC “gap-fillers.” [If both offer 
  and acceptance expressly limit acceptance, then the  
  “acceptance” is really a counter-offer, in which case there is no 
  K. But the conduct of the parties can establish a K. In this case, any 
  different terms will get knocked out and any additional terms will fall 
  away. The needed terms will be supplied by gap-fillers.] 
  
    - The different 
    terms are seen to conflict with original offer. Both sets of terms 
    drop out and gap-fillers are used. (Comment 6, KNOCKOUT RULE)
 
    
      - Occasionally, 
      the different terms are considered to have been objected to, and so 
      do not become part of the K. 
 
      
    - Deposit doesn’t 
    equal acceptance, just a performance upon one of the terms
 
 
Four Offer/Acceptance Cases:
  - Neither offer nor 
  acceptance are expressly conditional:
 
  
    - K is formed under 
    2-207(1)
 
    - Knock Out Rule: 
    contradictory terms are knocked out (NOT 2-207(3))
 
    - Additional terms 
    are added as per 2-207(2)
 
    
      - B/w merchants, terms 
      go in automatically unless we meet 2-207(2)(a)-(c)
 
      
        - 2-207(2)(b) and 
        comment 4: Materially alter means to cause “surprise or hardship”
 
        
      - If not b/w merchants, 
      additional terms go in only with assent of both parties or when there 
      is no timely answer
 
      
  - Offer is expressly 
  conditional, acceptance is not
 
  
    - K is formed under 
    2-207(1)
 
    - First Shot Rule: 
    terms are of the offer only
 
    
  - Offer is not expressly 
  conditional, acceptance is
 
  
    - Acceptance isn’t 
    an acceptance but a counter-offer
 
    - No K unless there 
    is perfornence
 
    - Terms are determined 
    by 2-207(3)
 
    
  - Both offer and acceptance 
  are expressly conditional
 
  
    - No K until performance
 
    - Terms are determined 
    by 2-207(3)
 
 
Confirmation/Proposals to 
Addition: (2-207 comments) K has been formed, and is followed by 
a memo with the agreed upon terms and new ones
  - B/w merchants, 
  terms added even when there is no timely answer, except for:
 
  
    - If last offer is 
    expressly conditional, no terms added. 2-207(a).
 
    - Terms materially 
    alter K, or
 
    - There has been express 
    objection to these terms before
 
    
  - Not b/w merchants, 
  new terms must be expressly agreed upon before added.
 
Common Law: Last Shot Rule 
PRINCESS 
CRUISES, INC. V. GENERAL ELECTRIC CO. (P. 223) 
P sent purchase order to D with T&C (Offer). D returned fixed price 
quote (Counter-offer) then final price quote (also Counter-offer), both 
with own T&C limiting liability to the price of the K. P called 
D and said “go ahead” (Acceptance). D confirmed by letter. P sued 
D for consequential damages. For D. Liability limited per terms of its 
counter-offer.
  - Predominance 
  Test: Is the K over Goods (UCC) or Services (R2)?
 
  
  - Language of the 
  contract
 
  - Nature of the Business
 
  - Value of the Materials
 
  
  - Last Shot Rule 
  (Common Law): The party who sends the last form before acceptance governs 
  the transaction 
 
    - Last Shot Rule usually 
    benefits Seller, b/c it supplies the last form
 
    
  - Mirror Image 
  Rule: K can be formed only if the terms of one offer are accepted 
  precisely as stated. Any variation constitutes a counter-offer which 
  can be accepted. (R2 § 59, comment a)
 
Express 
Conditionality: Offer/Acceptance
BROWN 
MACHINE, INC. V. HERCULES, INC. (P. 231)  P submitted price 
quote/proposal for trim press including T&C limiting its liability 
(Invitation of Offer). D submits purchase order 
“expressly limiting” acceptance to its own T&C (Offer). P sends 
order acknowledgement form with own T&C stating D had 7 days to 
respond if it didn’t consent to terms. D sent letter changing one 
spec and saying all others are OK. D’s 
employee was injured by trim press and sues P. P sues D to recover damages. 
For D. Liability not limited.  
  - First Shot Rule: 
  Quotes aren’t offers unless they are adequately detailed
 
  - P’s Proposal Not 
  the Offer
 
  
    - Submitted for D’s 
    approval. 
 
    - Discussion of adjusting 
    price.
 
    - “No order…will 
    be binding…unless accepted by Brown”
 
    - Expired in 30 days.
 
    
  - D’s purchase order 
  was the Offer
 
  
    - Largely a matter 
    of convention
 
    
  - P’s order acknowledgement 
  form was the Acceptance (UCC §2-207(1))
 
  
    - P did not make acceptance 
    expressly conditional
 
    
      - Must notify other 
      party that they are unwilling to proceed unless new terms are 
      agreed to.
 
      
        - “7 day” clause 
        was not sufficient.
 
        
    - (Under common law 
    it would have been a counter-offer b/c Mirror Image Rule.)
 
    
  - P’s new terms 
  do not become part of K (UCC §2-207(2))
 
  
    - D’s original offer 
    does limit acceptance to its T&C
 
    - P’s new terms 
    would materially alter the K
 
Test 
for Materiality: Surprise/Hardship 
(Dale Horning)
  - Surprise: 
  If it doesn’t comport with trade practice
 
  - Hardship
 
  
    - Significant economic 
    harm
 
    - Significant risk 
    is being shifted
 
 
Examples of Materiality 
in § 2-207 comments 4 & 5:
  - Disclaiming warranties: 
  always material
 
  - Choice of forum: 
  probably material
 
  - Arbitration requirement: 
  maybe material (courts tend to favor arbitration clauses)
 
  - Interest payments 
  for overdue accounts: probably not material
 
  - Payment of attorneys 
  fees: probably not material
 
Additional 
Terms. DALE R. HORNING CO. V. FALCONER GLASS (P. 240) 
P agreed to buy glass from D over the phone. The next day, both parties 
sent written confirmations. D’s contained fine print limiting liability 
for consequential damages. Glass was defective. P sues for consequential 
damages. For P. K was formed over the phone. D’s terms do not 
control.
  - D’s confirmation 
  considered Acceptance
 
  - D’s terms do 
  not become part of K (UCC §2-207(2)) b/c they would materially 
  alter the K
 
  - Test for Materiality: 
  Surprise/Hardship (You need both.)
 
  
    - Hardship – Term 
    shifts risk from one party to the other