This guide is general legal information, not legal advice, and does not create an attorney–client relationship. Rules change and vary by state — verify current requirements with official sources or a licensed attorney.
Most supply relationships run on paperwork nobody reads until something breaks: a purchase order, an order acknowledgment, and two sets of standard terms that contradict each other. When the shipment is late, the parts are defective, or the supplier's plant shuts down, the question becomes which of those documents governs — and the answer is often neither entirely.
Contracts for the sale of goods in the United States are governed by Article 2 of the Uniform Commercial Code, adopted in some form by every state (Louisiana being the notable partial exception). Article 2 supplies default rules wherever the parties' documents are silent or in conflict. Understanding what those defaults give you is the fastest way to see which clauses are worth negotiating.
Key takeaways
- UCC Article 2 governs sales of goods and fills gaps automatically; services and mixed contracts may be governed by common law instead, depending on the predominant purpose.
- Section 2-207 resolves the "battle of the forms" — a purchase order and a conflicting acknowledgment can still form a contract, on terms neither side chose.
- Implied warranties of merchantability and fitness arise by default and can be disclaimed only in the manner the Code specifies.
- Remedy limitations are enforceable under § 2-719 unless the exclusive remedy fails of its essential purpose, and consequential-damages exclusions fall if unconscionable.
- Force majeure is a contract term; the statutory excuse in § 2-615 is narrower than most buyers and sellers assume.
First question: which body of law applies
Article 2 covers transactions in goods — movable things. A software subscription, a consulting engagement, or a maintenance service is not a sale of goods, and most courts apply common-law contract principles instead. Mixed contracts (equipment plus installation plus a service term) are usually classified by their predominant purpose, meaning one test decides the rules for warranties, remedies, and gap-fillers across the whole agreement. If a deal is genuinely hybrid, separating the goods and services components into distinct agreements or exhibits avoids arguing about it later.
The Cornell LII edition of the UCC sets out the article structure, but states may have adopted different official versions or local amendments — verify against your state's enacted text where the point is material.
The battle of the forms
Here is the pattern. A buyer sends a purchase order with its standard terms on the back — supplier indemnifies buyer, buyer's state law governs, no limitation of liability. The supplier ships and sends an acknowledgment with its own terms — liability capped at the purchase price, no consequential damages, supplier's state law governs. Nobody signs anything.
Under UCC § 2-207, a definite expression of acceptance operates as an acceptance even though it states additional or different terms, unless acceptance is expressly conditioned on assent to those terms. Between merchants, additional terms become part of the contract unless the offer limited acceptance to its terms, the terms materially alter the deal, or objection has already been given or is given promptly. And where the writings do not otherwise establish a contract but the parties behave as though one exists, the contract consists of the terms on which the writings agree, plus the Code's gap-fillers.
Practical note: The default rules produce results neither side would have negotiated. Clauses that materially alter the bargain — an arbitration requirement, a warranty disclaimer, an indemnity — commonly drop out. The reliable fix is unglamorous: a signed master agreement setting the terms, with purchase orders limited to quantity, price, specification, and delivery date, and an express statement that any conflicting terms in an acknowledgment have no effect.
Quality: specifications, warranties, and inspection
Article 2 creates warranties without anyone writing them. An express warranty arises from any affirmation of fact, description, or sample that becomes part of the basis of the bargain — including statements in a datasheet or an email. The implied warranty of merchantability arises where the seller is a merchant in goods of that kind and requires, among other things, that the goods pass without objection in the trade and are fit for their ordinary purposes. An implied warranty of fitness for a particular purpose arises where the seller knows the buyer's particular purpose and the buyer relies on the seller's skill to select the goods.
Sellers may disclaim implied warranties, but only in the way the Code allows: a merchantability disclaimer must mention merchantability and, if written, be conspicuous; a fitness disclaimer must be in writing and conspicuous; and expressions like "as is" can exclude implied warranties in the right context. A disclaimer buried in unformatted small print invites a conspicuousness challenge.
Two operational terms decide whether warranty rights are usable at all. First, inspection and acceptance: buyers who accept goods and later discover defects face notice requirements and a narrower remedy set than buyers who reject on inspection. Second, notice of breach — Article 2 bars a buyer who accepted goods from remedy unless the seller is notified within a reasonable time after discovery, so put a concrete window in the contract rather than litigating what "reasonable" meant.
Remedies, caps, and the limits on limits
Suppliers standardly limit remedies to repair or replacement and exclude consequential damages. Both are permitted. Section 2-719 allows parties to substitute or limit remedies and to make a limited remedy exclusive, and allows exclusion of consequential damages unless the exclusion is unconscionable — with limitation of damages for personal injury from consumer goods presumptively unconscionable, while limitation for commercial loss is not.
The provision that catches drafters is the essential-purpose rule: where circumstances cause an exclusive or limited remedy to fail of its essential purpose, the buyer may pursue the Code's ordinary remedies. A repair-or-replace remedy fails when the supplier cannot or will not make the goods conform after reasonable attempts. Courts split on whether that failure also unravels a separate consequential-damages exclusion, so sophisticated agreements state expressly that the damages exclusion is independent and survives.
| Clause | Risk it allocates | Point to negotiate |
|---|---|---|
| Liability cap | Maximum total exposure | Whether it is a share of fees, an absolute figure, or a rolling twelve-month measure; which claims sit outside the cap |
| Consequential-damages exclusion | Lost profits, downtime, recall costs | Carve-outs for confidentiality breach, IP indemnity, and willful misconduct |
| Indemnity | Third-party claims | Scope, defense control, notice duties, and whether it survives the cap |
| Insurance | Whether the counterparty can actually pay | Coverage types, limits, additional-insured status, certificates before first delivery |
| Force majeure | Non-performance from external events | Event list, notice period, mitigation duty, allocation duty, termination right after a stated delay |
| Price adjustment | Input-cost and tariff volatility | Index used, adjustment frequency, caps and collars, right to reject an increase |
| Term and termination | Being locked in, or cut off | Notice length, transition assistance, last-buy rights |
These clauses do the same work here that they do everywhere else in commercial paper; our companion guide on the contract clauses that most often control risk covers the general drafting logic.
Disruption: force majeure, shortages, and price shocks
Force majeure is a creature of contract, not of general law. If the clause does not cover the event, it does not apply — which is why event lists written before recent years of pandemic disruption, port closures, cyber incidents, and shifting tariff regimes have been rewritten to name those categories explicitly.
The statutory backstop is narrow. Section 2-615 excuses a seller's delay or non-delivery where performance has been made impracticable by a contingency the non-occurrence of which was a basic assumption of the contract, or by compliance with a governmental order. Where capacity is only partly affected, the seller must allocate production among customers in a fair and reasonable manner and must notify buyers seasonably of delay, non-delivery, and any quota. Increased cost alone is generally not enough; courts have repeatedly held that a supplier's thinner margin is the risk the supplier took.
Buyers dependent on a single source should therefore negotiate allocation priority in writing, minimum committed volumes, supplier-held safety stock, tooling ownership, and a second qualified source for critical inputs. As of mid-2026, tariff and trade-policy volatility has made customs classification, country-of-origin representations, and who bears duty increases standard negotiation points rather than boilerplate.
When the supplier fails
Insolvency changes the analysis completely, because contract rights become claims. A few defensive measures actually help:
- Diligence before signing. Financial statements, credit checks, references, and — for critical suppliers — site visits and capacity verification.
- Own the tooling and record it. Written title, marked equipment, and a bailment agreement so molds and fixtures are identifiable and retrievable.
- Escrow and step-in rights. Source-code or technical-data escrow with defined release conditions where continuity depends on the supplier's know-how.
- Security interests. Where the buyer prepays or advances tooling costs, a perfected UCC Article 9 filing turns an unsecured exposure into a secured one.
- Transition assistance. An obligation to continue supply and to help qualify a replacement for a defined period after termination.
- Monitoring triggers. Contractual notice of material adverse changes, missed covenants, or ownership changes.
If the supplier files, an automatic stay halts collection and the debtor may assume or reject executory contracts — an outcome mapped in our overview of Chapter 7, Chapter 11, and reorganization. Contract clauses purporting to terminate automatically on a bankruptcy filing are often unenforceable, so structural protections beat clever drafting here. Where a supply relationship is deep enough to resemble a shared enterprise, consider whether the arrangement is really a joint venture requiring its own governance.
Frequently asked questions
Whose terms win if we exchange conflicting forms?
Often neither side's, entirely. Under § 2-207 a contract can form even with conflicting documents, and conflicting or materially altering terms may be knocked out and replaced by the Code's default rules. Because those defaults were not negotiated by anyone, the practical answer is to sign a master agreement and keep purchase orders limited to commercial details.
Is a liability cap always enforceable?
Usually, between commercial parties. Caps and consequential-damages exclusions are enforceable under § 2-719 subject to unconscionability, and courts respect allocations negotiated between businesses. Enforcement weakens where an exclusive limited remedy has failed of its essential purpose, where a cap would leave a party with no meaningful remedy at all, or where state law restricts limiting liability for gross negligence or willful misconduct.
Does a price increase excuse a supplier from delivering?
Rarely. Section 2-615 requires impracticability from a contingency that was a basic assumption of the contract, and courts have generally held that cost increases — even sharp ones — are the kind of market risk the seller assumed. Suppliers wanting relief need an express price-adjustment mechanism, an index, or a stated right to renegotiate.
Do we need a master agreement for small purchases?
Not for genuinely low-value, low-risk buys where the exposure is the purchase price. Master agreements earn their cost when the input is critical to production, when defects could cause downstream loss, when the supplier touches confidential data, or when the relationship will run for years. A short standard-terms document applied consistently is a reasonable middle path.
How does this fit into buying a business?
Supply agreements are core diligence material. Buyers look for change-of-control provisions, exclusivity, minimum purchase commitments, uncapped indemnities, and single-source dependencies — the same items reviewed in legal due diligence. Contracts that terminate on a change of control can materially affect deal structure.
A workable approach
Tier the effort. Classify suppliers by criticality and spend, then apply a signed master agreement with negotiated warranty, remedy, insurance, and continuity terms to the top tier; standard terms with a liability cap to the middle; and a clean purchase-order process to the rest. Review the top tier annually against actual performance, and refresh force majeure and price-adjustment language when the operating environment shifts.
Two habits pay for themselves: a single authoritative contract repository, and training the people who send purchase orders on what not to sign. Most bad supply outcomes trace to a document exchanged by someone who did not know it created terms. General small-business guidance is published by the U.S. Small Business Administration, and more commercial-law material sits in our business and corporate law hub. This article is general information, not legal advice; UCC adoptions and case law vary by state.
