Product and service warranties are among the most underestimated legal exposures a growing company carries. Every promise you make about a product’s quality—or a service’s outcome—can become an enforceable obligation, whether you wrote it down or not. For business owners scaling past their first big contracts, getting product and service warranties right is the difference between a manageable refund and a bet-the-company lawsuit.
This guide explains how express and implied warranties work, where the Uniform Commercial Code (UCC) quietly creates obligations you never signed up for, and the mistakes that turn a routine complaint into a legal claim. None of this is theoretical. Warranty terms are litigated constantly, and the rules reward businesses that draft deliberately.
What You’ll Learn
What Product and Service Warranties Actually Cover
A warranty is simply a legally enforceable promise about what you are selling. Product and service warranties fall into two broad buckets: express warranties that you state affirmatively, and implied warranties that the law attaches automatically to certain sales. Most disputes happen because owners focus only on the first bucket and forget the second exists.
The distinction matters because you can control express warranties with careful drafting, but implied warranties arise by operation of law and must be affirmatively disclaimed. If you sell goods, the UCC governs. If you sell services, common-law contract principles and any express service guarantees control. Knowing which regime applies is the first strategic decision.
Express Warranties: The Promises You Make on Purpose
An express warranty is created by any affirmation of fact or promise that becomes part of the bargain. Under UCC § 2-313, a description of the goods, a sample, or a model can all create an express warranty—no magic words required. You do not have to say “I warrant” to be on the hook.
This is where marketing copy becomes a liability. A spec sheet claiming your equipment “runs 10,000 hours maintenance-free” is an express warranty, and a salesperson’s email can be too. The same logic that governs reps and warranties in an M&A deal applies to your everyday customer promises: written commitments get enforced as written.
Keep express warranties consistent
Conflicting promises across your website, contract, and sales deck create ambiguity that courts resolve against the drafter. Pick one warranty statement, put it in the contract, and make every other document point back to it.
Implied Warranties Under the UCC
Two implied warranties do the most damage when businesses ignore them. The implied warranty of merchantability under UCC § 2-314 means goods sold by a merchant must be fit for their ordinary purpose. The implied warranty of fitness for a particular purpose under UCC § 2-315 arises when you know the buyer is relying on your judgment to select a suitable product.
These warranties attach automatically. You never signed anything, but the law reads them into the sale. That is precisely why product and service warranties need a deliberate disclaimer strategy rather than silence.
- Merchantability: Applies to any merchant selling goods of that kind. Passes without a signature.
- Fitness for a particular purpose: Triggered when the buyer relies on your expertise for a specific use.
- Title and against infringement: UCC § 2-312 implies you actually own what you sell and it does not infringe.
Disclaimers, “As Is,” and the Magnuson-Moss Trap
You can disclaim implied warranties—but only if you do it correctly. To disclaim merchantability, the UCC requires you to mention “merchantability” by name, and a written disclaimer must be conspicuous. Selling goods “as is” or “with all faults” generally excludes implied warranties, provided the language is clear and prominent.
Here is the trap. Under the federal Magnuson-Moss Warranty Act, once you give a written warranty on a consumer product, you cannot disclaim implied warranties at all—you can only limit their duration to the length of the written warranty. Businesses that offer a limited warranty and then bury an “all implied warranties disclaimed” clause are creating an unenforceable—and sometimes deceptive—term.
Service Warranties vs. Service Contracts
Service businesses face a parallel set of issues. A service warranty is your promise that the work will meet a defined standard. A service contract (or extended warranty) is a separate agreement, often paid for, to repair or maintain something over time. Confusing the two creates accounting, tax, and regulatory headaches.
For services, courts imply a duty to perform in a workmanlike manner, and your express guarantees define the ceiling of what customers can expect. Tie your service warranty to objective, measurable standards—response times, defect rates, re-performance rights—so “satisfaction” is not left to the customer’s mood. Operators who standardize quality with documented SOPs, the kind our consulting colleagues at Collateral Base build for regulated operators, are far easier to defend when a warranty claim lands.
7 Costly Warranty Mistakes to Avoid
Most warranty litigation traces back to the same avoidable errors. Fix these before your next sale.
- 1. Silent on implied warranties. Saying nothing does not remove them—it leaves the UCC defaults in place.
- 2. Non-conspicuous disclaimers. Fine print in gray 6-point type will not satisfy the “conspicuous” requirement.
- 3. Magnuson-Moss conflict. Offering a written warranty and then disclaiming implied warranties on a consumer product.
- 4. Marketing that overpromises. Ad copy and demos create express warranties you never intended.
- 5. No limitation of remedies. Failing to cap liability to repair, replacement, or refund invites consequential-damage claims.
- 6. Ignoring the statute of limitations. The UCC generally allows four years to sue for breach of warranty—plan your records accordingly.
- 7. One-size-fits-all terms. Consumer and business (B2B) sales follow different rules; reusing the same clause for both backfires.
Each of these ties back to disciplined contract drafting—the same mindset that makes small-business M&A and a well-built letter of intent defensible. When a warranty dispute escalates toward litigation, our colleagues at Howard Law Group handle the contested end of these claims.
Frequently Asked Questions
Do I have to put product and service warranties in writing?
Not to create them. Express warranties can arise from oral statements, demos, and marketing, and implied warranties attach automatically under the UCC. Putting product and service warranties in a clear written contract is how you control them, not how you create them.
Can I sell “as is” to avoid warranty claims?
Often yes for goods, if the “as is” language is conspicuous and you have not also issued a written warranty. On consumer products with a written warranty, Magnuson-Moss blocks a full disclaimer—you may only limit implied warranties to the written warranty’s duration.
How long can a customer bring a warranty claim?
Under UCC § 2-725 the default statute of limitations for breach of a sales warranty is four years from delivery, though parties can shorten it to as little as one year by agreement. State law and consumer-protection statutes can change the analysis, so confirm your jurisdiction.
Next Steps
Strong product and service warranties are built on purpose: a single clear express warranty, a compliant disclaimer of implied warranties, a remedy cap, and terms that match consumer versus B2B sales. Review your current contracts and marketing against the seven mistakes above before your next big order.
Want your warranty terms reviewed before they cost you? Schedule a consultation with Howard East.
This article is general information, not legal advice. No attorney-client relationship is created by reading it. Attorney Advertising.
