Stickers reading “warranty void if removed” are not legally enforceable in the United States. Under the federal Magnuson-Moss Warranty Act, a manufacturer cannot cancel your warranty just because you peeled off a seal, opened the case, or used a third-party repair shop. To deny a claim, the company has to show that something you actually did caused the specific problem you’re asking it to fix. Breaking the sticker, by itself, is not enough.
Why the Sticker Alone Doesn’t Void Your Warranty
The Magnuson-Moss Warranty Act is the main federal law governing consumer product warranties. Under 15 U.S.C. § 2302(c), a manufacturer cannot condition a written or implied warranty on your use of any article or service identified by brand, trade, or corporate name, unless that article or service is provided to you free of charge under the warranty.1Office of the Law Revision Counsel. 15 USC 2302 – Rules Governing Contents of Warranties
In plain terms, a company can’t require you to use its branded parts or its authorized repair network to keep your warranty alive, unless it hands those parts and services to you at no cost. A sticker warning that your warranty disappears the second you open the device is a blunter version of the same idea, and it runs into the same legal wall.
Federal regulations at 16 CFR § 700.10 flesh this out. A manufacturer cannot condition your warranty on the use of only authorized repair service or only authorized replacement parts for routine maintenance and non-warranty service. The regulation flags language like “this warranty is void if service is performed by anyone other than an authorized dealer” as a violation, and treats softer phrasing as deceptive when a reasonable consumer would read it as a warranty requirement.2eCFR. 16 CFR 700.10 – Prohibited Tying
A “warranty void if removed” sticker sits squarely in that territory. It implies that any unauthorized look inside the product kills the warranty, regardless of what happened once you were in there. The only way a manufacturer can legally impose that kind of blanket condition is by applying for and receiving a formal waiver from the Federal Trade Commission, which has to find the waiver in the public interest.1Office of the Law Revision Counsel. 15 USC 2302 – Rules Governing Contents of Warranties These waivers are extremely rare.
When a Manufacturer Can Legitimately Deny Coverage
The law does not hand consumers a blank check. Manufacturers keep the right to deny claims when your actions actually caused the defect. The critical word is “caused.” A company must trace the failure back to what you did.2eCFR. 16 CFR 700.10 – Prohibited Tying
Some denials are fair game:
- You replaced a component yourself, installed it incorrectly, and that mistake fried the motherboard. The motherboard damage is on you.
- You installed an aftermarket battery that overheated and damaged surrounding parts. The damage from that battery can be denied.
- You dropped the device, exposed it to water beyond its rating, or used it in ways the manual warns against.
The pattern is simple. If your laptop’s speaker stops working and the company sees you replaced the hard drive six months ago, those two events are not connected. Denying the speaker claim because you opened the case would violate federal law.
Cars, Aftermarket Parts, and Independent Shops
Vehicles are one of the most common battlegrounds. The FTC’s guidance is direct: your warranty stays in effect if you use aftermarket or recycled parts on your vehicle. If a defective aftermarket part or an improper installation damages a component the warranty covers, the manufacturer or dealer can deny coverage for that specific damage, but the burden is on them. The dealer must prove the aftermarket or recycled part caused the damage before refusing to honor the warranty.3Federal Trade Commission. Auto Warranties and Auto Service Contracts
So if you install an aftermarket exhaust and your transmission later fails, the dealer cannot blame the exhaust without showing a causal link. In practice, dealerships sometimes try, which is why keeping receipts and service records matters.
What the FTC Has Done About These Stickers
The FTC has actively pursued companies using illegal warranty conditioning language. In 2018, staff sent warning letters to six companies whose warranty statements appeared to tie coverage to authorized parts or service, giving them 30 days before re-examining their practices.4Federal Trade Commission. FTC Staff Sends Warranty Warnings
In July 2024, the FTC sent a fresh round of warning letters to eight companies. Three of those letters specifically targeted the use of stickers reading “warranty void if removed” or similar language placed in locations that hinder consumers’ ability to perform routine maintenance and repairs. Five other letters warned companies about statements requiring consumers to use specified parts or service providers to keep warranties intact.5Federal Trade Commission. FTC Warns Companies to Stop Warranty Practices That Harm Consumers’ Right to Repair
Companies that violate the FTC Act’s ban on deceptive practices face civil penalties of up to $53,088 per violation as of 2025, adjusted annually for inflation.6Federal Trade Commission. FTC Publishes Inflation-Adjusted Civil Penalty Amounts for 2025 Multiplied across thousands of stickered units, the exposure is real.
Products the Law Doesn’t Cover
The Magnuson-Moss Warranty Act only applies to consumer products, meaning items normally used for personal, family, or household purposes. Products sold for resale or commercial purposes fall outside the Act entirely.7Federal Trade Commission. Businessperson’s Guide to Federal Warranty Law If you buy industrial equipment or commercial-grade machinery, the sticker rules discussed here do not automatically apply, and your warranty is governed by the contract and the Uniform Commercial Code.
What to Do If Your Claim Gets Denied
If a manufacturer denies your warranty claim because you opened the product or used third-party parts, and the company cannot show your actions caused the problem, you have options.
Start by documenting. Before opening any product, photograph its condition. Save the warranty terms, your receipt, and any communications. If your claim is denied, ask for the denial in writing and request a specific explanation of what you allegedly did to cause the defect. A vague response citing a broken seal is exactly the kind of denial the law prohibits.
Escalate with the manufacturer. Many denials come from front-line customer service reps reading from a script. Citing the Magnuson-Moss Warranty Act and the FTC’s tie-in prohibition by name can move the conversation to a supervisor, and some companies will reverse a denial rather than risk a formal complaint.
File a complaint with the FTC through ReportFraud.ftc.gov. The form asks you to describe the company, the warranty issue, and any payments involved.8Federal Trade Commission. How to Report Fraud Individual complaints feed the FTC’s enforcement database and help build the pattern evidence behind actions like the 2018 and 2024 warning letters.
Contact your state consumer protection office. Every state has one, and many will investigate complaints or mediate directly with the company.9USAGov. State Consumer Protection Offices
Consider legal action. The Magnuson-Moss Warranty Act lets consumers sue over warranty violations. Under 15 U.S.C. § 2310(d), you may recover the cost of repair, consequential damages, and in some cases attorney’s fees. For lower-value products, small claims court is often the most practical route, with filing fees typically ranging from around $10 to $75. One catch: if the manufacturer’s warranty includes a required informal dispute resolution process, you may have to go through that step before filing suit.10Office of the Law Revision Counsel. 15 US Code 2310 – Remedies in Consumer Disputes