Merchant’s Confirmatory Memo Rule: Quantity and the 10-Day Window

The merchant’s confirmatory memo rule, set out in UCC Section 2-201(2), lets a written confirmation of an oral agreement satisfy the Statute of Frauds against a merchant who receives it and fails to object in writing within 10 days.¹ In plain terms: if two businesses close a deal by phone and one sends a signed follow-up, the other side has 10 days to push back or lose the right to argue there was no writing.

The Problem the Rule Solves

UCC Section 2-201(1) says a contract for the sale of goods worth $500 or more cannot be enforced unless there is a writing signed by the party being sued.¹ Applied strictly between businesses, that rule produces an awkward result. You verbally agree to buy 5,000 units from a supplier. The supplier sends a confirmation. You never sign it. Technically, the supplier has no enforceable contract and you can walk away.

Merchants close deals by phone and in person all the time, then paper them later. Section 2-201(2) exists so professional traders cannot exploit the signature requirement to escape deals they actually made. The sender’s signed confirmation stands in for the receiver’s signature, provided the receiver stays silent.

When the Rule Applies: Both Parties Must Be Merchants

The confirmatory memo rule only works “between merchants.” Both sides have to qualify. UCC Section 2-104 defines a merchant as someone who regularly deals in the kind of goods involved, or who holds themselves out as having specialized knowledge of the trade practices or goods at issue.² A grain dealer, an electronics manufacturer, a fabric wholesaler all fit. You can also qualify through an agent or broker with that knowledge.

A consumer buying a single piece of equipment off Craigslist does not qualify. A one-time seller clearing out a garage does not either. If either side is a non-merchant, Section 2-201(1) applies in full and only a writing signed by the party being sued will do.²

What the Memo Has to Say

A valid confirmatory memo has three ingredients. It must indicate that a contract for sale was made, be signed by the sender, and state a quantity.¹ It must also be “sufficient against the sender,” meaning the sender could themselves be held to the contract based on this document alone. That built-in reciprocity keeps the rule honest. You cannot bind the other side with a vague note while leaving yourself an exit.

Quantity Is the Only Term You Must Get Right

Of all the terms a deal might include, quantity is the only one that absolutely must appear. Enforcement is capped at whatever quantity the writing shows.¹ Confirm 2,000 units when the oral deal was 3,000, and you are stuck at 2,000.

Price, delivery date, and payment schedule can be left out. The UCC fills those gaps with defaults, such as a reasonable price (usually market or list) and payment due on delivery. The gap-fillers keep the deal alive, but you give up control over terms you could have locked down. A careful memo spells out every agreed term even though only quantity is legally required.

What Counts as a Signature

The UCC treats “signed” broadly: any symbol adopted with the present intention to authenticate a writing.³ A handwritten name, initials, a company stamp, or a typed name at the bottom of a letter all work. Federal law adds that an electronic signature or record cannot be denied legal effect solely because it is electronic.⁴ An email from a business address with the sender’s name in the signature block can serve as the memo, as long as the record stays accessible for later reference.

Timing: When to Send and When to Object

The Sender’s Window

The memo must go out within a “reasonable time” after the oral agreement.¹ The UCC does not pin that down with a fixed deadline because industries differ. A perishable-goods dealer confirming the next morning is fine. A machinery supplier taking three weeks may still be fine given longer lead times. Sitting on it for months almost certainly disqualifies the memo; at that point it looks less like a confirmation and more like fabrication.

Same day or next business day is the safe practice. Fast confirmations also cut down on honest memory errors about quantities, prices, or ship dates.

The Receiver’s 10 Days

Once the memo is received, the recipient has 10 days to send a written objection.¹ No special format or magic language is required. A short note saying “we dispute the existence of this agreement” or “the terms in your confirmation do not reflect our understanding” is enough. It just has to be in writing and directed at the memo’s contents.

The clock starts on receipt, not on reading. If the memo lands in your office mail on Monday, the 10 days begin that Monday whether or not someone opens the envelope on Thursday. The statute requires the recipient to have “reason to know its contents,” and courts generally treat a merchant receiving a document styled as a confirmation as having that reason. Letting mail pile up is not a defense.

What Silence Actually Does

Missing the 10-day window does not create a contract out of thin air. It does something narrower: it strips the silent merchant of the Statute of Frauds as a defense.¹ The sender still has to prove the oral deal existed at trial, through testimony about the call, prior dealings, industry custom, and any follow-up communications.

That distinction matters. The rule is procedural, not substantive. It keeps the courthouse doors open; it does not guarantee the sender wins. But for a merchant who genuinely never agreed to the deal described, losing the Statute of Frauds defense means fighting a full trial instead of winning early dismissal. That is why the 10-day window deserves immediate attention when a confirmation arrives.

Watch Out for Terms That Were Never Discussed

Confirmations do not always mirror the oral deal. A seller might slip in a warranty disclaimer. A buyer might add a late-delivery penalty. UCC Section 2-207 governs these extras. Between merchants, additional terms become part of the contract automatically unless they materially alter the deal, the original offer expressly limited acceptance to its own terms, or the other party objects within a reasonable time.⁵

A “material alteration” is any term that would cause surprise or hardship if quietly incorporated. A binding arbitration clause, a shift in the risk of loss, or an across-the-board warranty disclaimer tend to qualify. Minor additions like a standard shipping method the parties have used before usually survive. Reviewing an incoming confirmation is not just about whether to object within 10 days to preserve a Statute of Frauds defense. It is also about catching terms that could change the deal under 2-207.

When the Memo Rule Isn’t the Right Tool

The confirmatory memo is one of several routes around the writing requirement. Section 2-201(3) recognizes three others that apply whether or not the parties are merchants:¹

Specially manufactured goods, where the seller has made a substantial start on items custom-built for the buyer and not suitable for resale to anyone else.
A court admission, where the party denying the contract admits under oath, in a pleading, deposition, or testimony, that an agreement existed. Enforcement is capped at the admitted quantity.
Partial performance, where goods have been delivered and accepted, or payment has been made and accepted. The contract is enforceable to the extent of that performance.

If one side is a consumer, if no confirmation was ever sent, or if the memo arrived months late, these other exceptions are where the analysis moves next.

1
Legal Information Institute. Uniform Commercial Code 2-201 – Formal Requirements; Statute of Frauds
2
Legal Information Institute. Uniform Commercial Code 2-104 – Definitions: “Merchant”; “Between Merchants”; “Financing Agency”
3
Legal Information Institute. Uniform Commercial Code 1-201 – General Definitions
4
Office of the Law Revision Counsel. 15 U.S. Code 7001 – General Rule of Validity
5
Legal Information Institute. Uniform Commercial Code 2-207 – Additional Terms in Acceptance or Confirmation