Most advertisements are not offers — they're bait to get you into the store, and the law calls them invitations to deal. Lefkowitz v. Great Minneapolis Surplus Store is the case your Contracts professor uses to blow a hole in that comfortable rule. It's the one where a man named Morris Lefkowitz showed up twice to buy heavily discounted furs advertised for a dollar, was turned away on a made-up 'house rule,' and won. Know this case as the exception that defines the boundary: when does a mere ad harden into a real, acceptable offer?

What did Lefkowitz v. Great Minneapolis Surplus Store hold?

In Lefkowitz v. Great Minneapolis Surplus Store, 251 Minn. 188, 86 N.W.2d 689 (1957), the Minnesota Supreme Court held that a newspaper advertisement constitutes a binding offer when it is clear, definite, and explicit, and leaves nothing open to negotiation. Where an ad specifies the item, the quantity, the price, and how one may accept — here, "1st Come 1st Served" — the person who shows up and satisfies those terms has accepted, forming an enforceable contract. The court further held that the seller cannot enforce a limiting condition (like the store's alleged 'house rule' that the sale was for women only) that was never stated in the offer.

Case Summary

Lefkowitz v. Great Minneapolis Surplus Store was decided by the Supreme Court of Minnesota in 1957. It's a foundational offer-and-acceptance case in nearly every first-year Contracts course, cited for the proposition that advertisements are usually invitations to negotiate but can become offers when sufficiently definite. The plaintiff, Morris Lefkowitz, sued the store for refusing to honor its advertised sale price on a fur stole. The trial court found for Lefkowitz; the Minnesota Supreme Court affirmed the finding that a contract existed.

What were the facts of Lefkowitz?

The Great Minneapolis Surplus Store ran two newspaper advertisements in the Minneapolis Star. The first announced:

"Saturday 9 A.M. Sharp — 3 Brand New Fur Coats Worth to $100.00 — First Come First Served — $1 Each."

A week later, the second ad offered, among other items, "1 Black Lapin Stole Beautiful, worth $139.50 . . . $1.00 First Come First Served."

On both Saturdays, Lefkowitz was the first customer to appear at the store and demanded the advertised merchandise, offering the stated $1 price. On the first occasion, the store refused to sell, citing a 'house rule' that the offer was intended for women only. On the second occasion — the black lapin stole — the store again refused, this time claiming Lefkowitz knew the sale was meant for women. The 'house rule' had never been published in either advertisement. Notably, on the second item, the stole had a genuine, identifiable value ("worth $139.50"), which mattered to the court's damages analysis.

What was the procedural history?

Lefkowitz sued for breach of contract in Minnesota trial court. The trial court held that a contract had been formed as to the second advertisement (the black lapin stole) and awarded Lefkowitz damages of $138.50 — the difference between the item's stated value ($139.50) and the $1 he was required to pay. It denied recovery on the first ad's fur coats because their value was left to speculation ("Worth to $100.00" was too indefinite to fix damages). The store appealed. The Minnesota Supreme Court affirmed.

What was the legal issue?

Was the store's newspaper advertisement a binding offer that Lefkowitz accepted by appearing first and tendering the price — such that a contract was formed — or was it merely an invitation to bargain that the store was free to withdraw or condition at will?

Holding & Rule

The Minnesota Supreme Court held that the second advertisement was a binding offer, that Lefkowitz accepted it, and that a contract was formed. This is the rule that goes in your outline:

An advertisement constitutes an offer where it is clear, definite, and explicit, and leaves nothing open to negotiation. When such an ad invites acceptance by a specific act — here, being the "first come" — the first person to perform that act accepts the offer and forms a contract.

Second rule, equally important on exams: a seller cannot impose new conditions on an offer after it has been accepted. The 'house rule' limiting the sale to women was not part of the published advertisement, so the store could not use it to modify or defeat a contract that had already formed. "While an advertiser has the right at any time before acceptance to modify his offer, he does not have the right, after acceptance, to impose new or arbitrary conditions not contained in the published offer."

What was the court's reasoning?

The court began with the settled general rule: advertisements are ordinarily invitations to negotiate, not offers, because they are typically indefinite as to quantity and other terms. A store that advertises a coat "on sale" hasn't promised to sell to everyone who walks in; it's inviting customers to make offers.

But the court reasoned that the test is whether the facts show an intent to make a definite offer that the recipient could accept, thereby completing the bargain. Definiteness is what pushes an ad across the line. The second advertisement identified a specific item (one black lapin stole), a specific price ($1), and a specific mode of acceptance (first come, first served). Nothing was left open. Under those facts, the ad was an offer for a unilateral-type performance: the first customer to appear and tender the dollar accepted.

On the 'house rule,' the court reasoned that once Lefkowitz accepted the published offer by being first and offering the price, the contract was complete. The store's undisclosed intention to sell only to women could not retroactively rewrite the deal. The offer said "first come, first served," not "first woman served." You can change your offer before someone accepts; you cannot bolt on new terms afterward.

On damages, the court distinguished the two ads. The stole's value was stated as a definite figure ($139.50), so damages were calculable. The fur coats in the first ad were "Worth to $100.00" — an open-ended, speculative figure — so no enforceable damages could be fixed for those. This is why Lefkowitz recovered on the stole but not on the coats.

Why Lefkowitz matters

Lefkowitz sits at the very front of the Contracts course, in the offer-and-acceptance unit, and it's the counterweight to the default rule that ads aren't offers. Cases like Leonard v. PepsiCo (the Harrier jet case) and the old English case Carlill v. Carbolic Smoke Ball Co. orbit the same question: when does a public announcement become a promise a court will enforce? Lefkowitz gives you the operative language — "clear, definite, and explicit, leaving nothing open to negotiation" — that you'll deploy every time an exam hands you an advertisement, a reward poster, or a promotional announcement and asks whether a contract can form. It also teaches the durable point that offer terms are fixed at acceptance and cannot be unilaterally supplemented afterward.

Cold-Call Prep: the questions your professor will ask

This is the section that keeps you from freezing when your name gets called. Expect these:

"What is the general rule about advertisements?" — Advertisements are generally invitations to negotiate (invitations to make an offer), not offers themselves, because they're usually too indefinite. Lead with this; the professor wants to see you know the rule Lefkowitz is an exception to.

"So why isn't this ad just an invitation to negotiate?" — Because it was clear, definite, and explicit and left nothing open to negotiation. It named a specific item, a specific price ($1), and a specific mode of acceptance ("first come, first served"). That definiteness is what makes it an offer.

"How did Lefkowitz accept?" — By performing the act the offer invited: being the first person to appear and tendering the $1. This looks like unilateral-offer analysis — acceptance by performance rather than by promise.

"What about the store's house rule?" — It was never in the published offer. An advertiser can modify an offer before acceptance, but not after. Once Lefkowitz accepted, the store was stuck with the terms as advertised. Don't let the professor push you into saying the store's private intent controls — it doesn't, because it was undisclosed.

"Why did Lefkowitz win on the stole but not the coats?" — This is the trap question that separates the students who read the whole opinion from those who skimmed. The coats were "worth to $100.00" — indefinite, so damages were speculative and unrecoverable. The stole had a stated definite value ($139.50), so the court could calculate damages of $138.50. Same offer principle; different damages outcome because of definiteness of value.

"How is this different from Leonard v. PepsiCo?" — In Leonard, the Harrier jet 'offer' was not clear, definite, and explicit — no reasonable person would think Pepsi was seriously offering a $23 million jet, and the ad referred buyers to a catalog rather than closing the deal. Lefkowitz's ad, by contrast, left nothing open. Definiteness and seriousness of intent are the fault line.

On the exam: how Lefkowitz shows up

On an issue-spotter, Lefkowitz is your go-to authority the moment a fact pattern involves an advertisement, a flyer, a reward notice, or an online promotion. The professor plants an ad and wants you to resolve whether a contract can form. Your move: state the general rule (ads are invitations to negotiate), then apply the Lefkowitz test — is the ad clear, definite, and explicit, leaving nothing open to negotiation? Look for the tells: a fixed price, an identified and quantity-limited item, and language of commitment like "first come, first served" or "first 100 customers."

The trap: Weak answers stop at "advertisements aren't offers" and never notice the definiteness signals. Strong answers argue both sides — cite Lefkowitz for why this ad might be an offer, then cite Leonard/general rule for why it might not — and resolve it on the specific language. Also don't forget the acceptance and post-acceptance modification points: if a seller tries to add a condition after the customer performs, Lefkowitz says that's too late. And watch the damages wrinkle: even a valid contract yields no recovery if the value is left indefinite.

Related cases you'll see alongside Lefkowitz

• Leonard v. PepsiCo, Inc. — the Harrier jet case; the modern counterpoint holding a promotional ad was not a serious, definite offer.
• Carlill v. Carbolic Smoke Ball Co. — the classic English case where a public advertisement promising a reward was held to be a binding unilateral offer; the intellectual ancestor of Lefkowitz.
• Lucy v. Zehmer — often taught nearby on the objective theory of contract; what matters is manifested, objective intent, not secret subjective intent (mirrors Lefkowitz's rejection of the undisclosed 'house rule').

Frequently asked questions

See the FAQ below for the fastest answers on the rule, the holding, and why the damages split.