Yes, a seller can waive the implied warranty of merchantability, but only by following one of the specific methods the Uniform Commercial Code allows, and federal law shuts the door on that waiver in a common situation: when the seller offers a written warranty or a service contract on a consumer product. Get the mechanics wrong and the disclaimer is unenforceable, leaving the seller exposed to the very claims the contract was supposed to prevent.
The Three UCC Methods for a Valid Waiver
Section 2-316 of the UCC gives sellers three distinct routes to exclude the implied warranty of merchantability. Each stands on its own, and each has to be executed precisely.1Legal Information Institute. UCC 2-316 – Exclusion or Modification of Warranties
The first is language that specifically mentions the word “merchantability.” If the disclaimer is written, it also has to be conspicuous. An oral disclaimer can name merchantability without the conspicuousness requirement, but proving the terms of an oral waiver is a different problem.
The second is broad disclaimer language such as “as is,” “with all faults,” or similar wording that in ordinary understanding tells the buyer there are no implied warranties. This route sweeps out both merchantability and the implied warranty of fitness for a particular purpose in one move. Some states, however, prohibit “as is” sales of consumer goods. The FTC has noted that in those states the seller’s implied warranty obligations cannot be avoided by contract language.2Federal Trade Commission. Businessperson’s Guide to Federal Warranty Law Check the state rule before relying on this method for a consumer sale.
The third route is course of dealing, course of performance, or usage of trade. Where the parties’ prior transactions or the customs of their industry treat goods as sold without warranties, that context can exclude the implied warranty without any explicit contract term. This path shows up in commercial sales between sophisticated parties, not in retail.
When Federal Law Blocks the Waiver Entirely
The Magnuson-Moss Warranty Act overrides the UCC’s flexibility for consumer products. If the seller gives the buyer any written warranty on a consumer product, or enters into a service contract with the buyer at the time of sale or within 90 days after, the seller cannot disclaim any implied warranty on that product. A disclaimer that tries to do so is void as a matter of federal law.3Office of the Law Revision Counsel. 15 USC 2308 – Implied Warranties
This creates a real trade-off. A seller who wants to advertise a written warranty as a selling point automatically forfeits the ability to disclaim implied warranties on that same product. The two cannot coexist.
Federal law does allow one middle option. A seller may limit the duration of implied warranties to the length of the written warranty, so long as the limitation is reasonable in duration, conscionable, set out in clear and unmistakable language, and prominently displayed on the face of the warranty.3Office of the Law Revision Counsel. 15 USC 2308 – Implied Warranties A two-year express warranty can cap implied warranty coverage at two years. It cannot cut implied coverage to zero.
What Conspicuous Actually Requires
The conspicuousness requirement is where written disclaimers most often fail. A term is conspicuous when a reasonable person against whom it operates should have noticed it. Courts look at whether the disclaimer stands out from the surrounding text: all-capital headings, larger font, bold type, or contrasting color all help satisfy the standard. A merchantability disclaimer buried in the same font and size as the rest of a dense contract likely does not.
Whether a term meets the standard is a decision for the court, not the drafter. That means the safe drafting approach is to over-signal rather than under-signal: separate the disclaimer visually, use bold or capitalized text, and put it somewhere the buyer is likely to read before agreeing.
When a Valid-Looking Disclaimer Still Fails
Even a disclaimer that clears every UCC technicality can be set aside. Two safety valves matter most.
Fraud is the first. A seller who actively misrepresents a product’s condition or hides known defects cannot then point to an “as is” clause when the problem surfaces. If the seller assured the buyer the goods were in working order to close the sale, courts generally refuse to enforce the disclaimer against that same buyer. The same logic applies when the seller obstructs the buyer’s inspection: you cannot block someone from examining the goods and then invoke the language they accepted.
Unconscionability is the second. Under UCC 2-302, a court that finds a clause unconscionable at the time the contract was made may refuse to enforce it, enforce the contract without it, or limit its application to avoid an unconscionable result.4Legal Information Institute. UCC 2-302 – Unconscionable Contract or Clause Extreme imbalances in bargaining power, hidden terms, and take-it-or-leave-it consumer contracts are the classic fact patterns.
There is also a specific limit on damage disclaimers that sit alongside warranty waivers. The UCC treats a clause limiting consequential damages for personal injury from consumer goods as prima facie unconscionable.5Legal Information Institute. UCC 2-719 – Contractual Modification or Limitation of Remedy Limits on purely commercial financial losses between businesses are generally enforceable; caps on bodily injury damages from defective consumer products are not.
Buyer Inspection as a Separate Waiver Path
A different mechanism operates before the contract is even signed. When the buyer, before entering into the contract, has examined the goods or a sample or model as fully as desired, or has refused to examine them after the seller’s demand, there is no implied warranty as to defects the examination ought in the circumstances to have revealed.1Legal Information Institute. UCC 2-316 – Exclusion or Modification of Warranties
This is narrower than it sounds. It only cuts off claims about defects that a reasonable inspection would have caught. Hidden defects that no inspection would reveal remain covered. A buyer who test-drives a used car and ignores an obvious grinding sound cannot later blame the brakes on the implied warranty; a latent transmission problem the test drive would not have surfaced still falls within it.
Used Goods and Private Sellers
Two boundary points affect who can waive what, and both matter for anyone drafting or reading a disclaimer.
The implied warranty of merchantability applies only when the seller is a merchant who regularly deals in goods of that kind. A private individual selling a personal car or lawnmower at a yard sale is not a merchant, and no implied warranty of merchantability arises in the first place. There is nothing to waive.
Used goods sold by merchants do carry the warranty, though the standard adjusts for the item’s age, condition, and price.2Federal Trade Commission. Businessperson’s Guide to Federal Warranty Law The same waiver rules apply: a used-car dealer can disclaim merchantability by name in a conspicuous writing, or sell “as is” where state law permits, but must clear each requirement the same way as a seller of new goods.