Mirror-Image Rule
This concept has one job, and it is the most reliable trap in the formation unit: figure out WHICH body of law governs before you ask anything else.
4. The Mirror-Image Rule
Under the common law, an acceptance must accept all the terms of the offer and cannot attempt to add or vary any terms. This is known as the “mirror-image rule.” The UCC has changed this rule with respect to contracts for the sale of goods. 28
- Under the common-law’s mirror-image rule, an acceptance cannot vary or add to the terms of the offer. If an offeree manifests an intent to accept the offer but includes new or different terms, that communication is a counteroffer rather than an acceptance.
- Whether the acceptance contains new or different terms is a question of fact based on comparing the terms of the offer (including implied terms) with the terms of the purported acceptance.
- The UCC changes the mirror image rule for the sale of goods. A contract between the parties may arise under the UCC even if the offeree’s communication includes terms that add to or modify the terms of the offer.
- The UCC approach focuses on determining whether the offeree’s communication is timely and manifests a definite expression of acceptance despite including new or different terms.
- The Nevada FLE does not require test-takers to know the rules that courts apply to determine if a contract governed by the UCC includes a term only in the other party’s record.
This concept has one job: figure out which body of law governs before anything else. At common law the mirror-image rule is strict, so an added-term reply is a counteroffer; under the UCC for goods, that same reply can still be a definite expression of acceptance and form a contract.
At common law, the mirror-image rule is strict. An acceptance has to mirror the offer exactly. It must accept all the terms and cannot try to add or vary a single one. If the offeree says yes but tacks on a new term, or changes a term, that reply is not an acceptance. It is a counteroffer. No contract forms on the offeree's terms, and the original offer is gone. Whether the reply actually contains a new or different term is a question of fact, and you compare the offer, including its implied terms, against the purported acceptance. So a term the offeree thinks is brand new might already be implied in the offer, in which case it varies nothing.
The sale of goods plays by different rules. The UCC changed the mirror-image rule for goods. Under the UCC, a contract can form even if the offeree's reply adds to or modifies the terms of the offer. The question is no longer whether the reply mirrors the offer. The question is whether the reply is timely and is a definite expression of acceptance, despite the extra or different terms. If it is, you have a contract.
So the same added-term reply produces opposite outcomes depending on the subject matter. For a deal in goods, the reply can still be an acceptance and a contract forms. For a services or real-estate deal, that same reply is a counteroffer and no contract forms on those terms. Goods follow concept one's definition: movable things, governed by the body of law for the sale of goods. Everything else stays at common law.
Once you know a contract forms under the goods rules despite the varying terms, the FLE does not ask you to decide which of the competing terms actually becomes part of the contract. That whole which-terms-get-in analysis is outside the tested scope. You test that a contract forms, or that a reply is a counteroffer, and you stop there.
Goods to UCC to lenient.
Non-goods to common law to mirror image.
First identify the subject matter, because that single fork decides whether an added-term reply is an acceptance or a counteroffer.
Common law: a reply that adds or varies any term is a counteroffer, never an acceptance.
UCC sale of goods: a timely, definite expression of acceptance is still an acceptance even with new or different terms.
The classic trap applies the wrong body of law.
If you ever reach 'contract forms' on a services deal by leaning on the UCC, or 'counteroffer, no contract' on a sale of goods by leaning on the mirror-image rule, stop and recheck the subject matter.
And remember: which varying term wins is out of scope; you only decide whether a contract forms at all.
Run the same added-term reply two ways, changing only the subject matter. Reply in both: "I accept your offer, and I'm adding that payment is due in thirty days." The thirty-day payment term was not in the original offer and is not implied by it, so it is a new or different term.
A landscaper offers to design and install a yard for a homeowner for a stated price. The homeowner replies with the words above. This is a services deal, so the common-law mirror-image rule governs. Because the homeowner's reply tries to add a term the offer did not contain, it is not an acceptance. It is a counteroffer. No contract forms on the homeowner's terms, and the landscaper's original offer is terminated. The landscaper is now free to accept the counteroffer, reject it, or walk away.
A bicycle wholesaler offers to sell a retailer two hundred bicycles for a stated price. The retailer replies with the same words, adding the thirty-day payment term. Bicycles are movable goods, so the body of law governing the sale of goods applies, and that law changed the mirror-image rule. The reply is timely and is a definite expression of acceptance, so a contract forms despite the added payment term. The added term does not knock the reply out of acceptance the way it would at common law.
Notice what we did not decide in version two. We said a contract forms. We did not decide whether the thirty-day payment term actually becomes part of that contract. Which competing term gets in is the which-terms-get-in question, and that is outside the tested scope. We stop at: a contract formed.
An option applies the lenient sale-of-goods rule to a services or real-estate deal, or applies the strict mirror-image rule to a sale of goods, getting the body of law backwards relative to the subject matter.
Identify the subject matter FIRST. Goods follow the changed rule, where a varying but timely definite expression of acceptance still forms a contract; non-goods stay at common law, where a varying reply is a counteroffer.An option misstates the standard, saying common-law acceptance may vary the terms slightly, or that under the goods rules any reply with a new term automatically fails to form a contract.
At common law ANY added or varied term makes the reply a counteroffer; under the goods rules a timely, definite expression of acceptance forms a contract despite new or different terms.An option reaches the correct yes or no but explains it with the wrong body of law, such as 'counteroffer' on a services deal justified by the goods rules, or 'contract formed' on a goods deal justified by the mirror-image rule.
Name the body of law that matches the subject matter; the right outcome must rest on the rule that actually governs the deal.An option states a flat universal such as 'any added term defeats acceptance' with no goods-versus-non-goods qualifier.
The rule has a boundary set by the subject matter; the goods rules expressly let a varying reply form a contract, so the universal is false.In a goods case, an option answers which competing term controls (for example, the offeree's added term automatically governs) instead of whether a contract forms.
Which competing term becomes part of the contract is outside the tested scope; the in-scope answer is only that a contract formed.an offeree manifests intent to accept but the reply adds a term or varies a term in the offer.
The instant you spot the added or varied term, do not answer yet.
ask the only question that matters here: is this a sale of goods, or is it services, real estate, or some other non-goods deal?
That fork picks the body of law.
Goods go to the sale-of-goods rules, where a timely, definite expression of acceptance forms a contract despite the new or different term.
Non-goods stay at common law, where the same reply is a counteroffer, no contract forms on those terms, and the original offer is terminated.
Whether the reply truly contains a new or different term is a question of fact judged against the offer's terms, including implied terms.
And if the call asks which competing term ends up in a goods contract, recognize that as the out-of-scope question and stay with whether a contract formed.
A roofing contractor sent a homeowner a signed written offer to replace the roof on the homeowner's house for a fixed price, with the work to begin the following week. The homeowner emailed back, "I accept, and I'm adding that you must haul away all the old shingles at no extra charge." The original offer had said nothing about hauling away the old shingles, and nothing in the offer implied that the contractor would do so. The contractor had not yet begun any work when the homeowner sent the reply.
Did the homeowner's reply operate as an acceptance that formed a contract?
A bicycle wholesaler sent a retailer a written offer to sell three hundred bicycles at a stated price per unit, with delivery in sixty days. Within the time the offer allowed for a reply, the retailer sent back a purchase confirmation that clearly agreed to buy the three hundred bicycles and added a term stating that the wholesaler would provide a one-year warranty on each bicycle. The offer had not mentioned any warranty. The retailer's confirmation plainly committed the retailer to the purchase.
Did the retailer's confirmation form a contract for the sale of the bicycles?
A furniture maker sent a retailer a written offer to sell forty dining tables at a stated price, with delivery in thirty days. Within the time allowed, the retailer sent back a reply that agreed to every term of the offer exactly as written, adding nothing and changing nothing. The reply repeated the quantity, the price, and the delivery date precisely as the offer had stated them.
Did the retailer's reply operate as an acceptance?
A painter sent a property manager a written offer to repaint the interior of an office suite for a stated price within two weeks. The painting is a service, not a sale of goods. The property manager replied, "I accept, but the price must include patching all the wall cracks before painting." The original offer had said nothing about patching wall cracks, and nothing in it implied that patching was included. After receiving the reply, the property manager changed course and tried to accept the painter's original offer on its original terms.
What effect did the property manager's first reply have on the painter's original offer?
An appliance manufacturer sent a hardware wholesaler a written offer to sell five hundred refrigerators at a stated price, with delivery in forty-five days. Within the time the offer allowed, the wholesaler sent back a confirmation that clearly committed to buying all five hundred refrigerators and added a term requiring the manufacturer to ship them in protective crates at the manufacturer's expense. The offer had said nothing about crating or who would pay for it. The confirmation was a definite expression of the wholesaler's commitment to buy.
Which of the following best states the effect of the wholesaler's confirmation?