What Sellers Should Disclose by Law: A Complete Guide

Last updated: August 22, 2026 — Data verified against official issuer terms (federal statutes, agency regulations, and state disclosure forms)

Whether you’re selling a house, a used car, or a product online, the law generally requires you to be honest about what you’re selling. But “be honest” only scratches the surface. In most transactions, sellers have an affirmative legal duty to disclose certain facts — even if the buyer never asks. Failing to do so can expose a seller to lawsuits, rescinded sales, regulatory fines, and in some cases, criminal penalties.

This guide breaks down what sellers are legally required to disclose across the three areas where disclosure law is most developed and most litigated: residential real estate, used vehicles, and general consumer transactions (including online sales). It also covers the legal theory behind disclosure duties, what happens when a seller fails to disclose, and a practical checklist sellers can use to protect themselves.

Disclaimer: This article is for general informational purposes only and is not legal advice. Disclosure laws vary significantly by state and country, and change over time. Before selling property, a vehicle, or a business, consult a licensed attorney or the relevant regulatory agency in your jurisdiction.

1. The Legal Foundation: Why Sellers Have to Disclose Anything at All

Historically, the default rule in common law was caveat emptor — “let the buyer beware.” Under this rule, sellers had almost no obligation to volunteer information; buyers were expected to inspect goods or property themselves before purchasing.

That rule has eroded substantially over the past several decades. Courts and legislatures in nearly every U.S. state have carved out an important exception: a seller who knows about a material fact — something that would affect the value, safety, or desirability of what’s being sold — that is not reasonably discoverable by the buyer generally has a duty to disclose it. This is often called the duty to disclose latent defects, as opposed to patent defects, which are visible or obvious and therefore don’t need to be pointed out.

Three legal theories typically create disclosure duties:

Statutory duty — A specific law (state or federal) requires disclosure of certain facts, usually using a standardized form. Real estate disclosure statutes are the clearest example.
Common-law fraud or misrepresentation — Even without a specific statute, a seller who knowingly conceals a material defect, or who makes a partial disclosure that is misleading, can be liable for fraud or negligent misrepresentation.
Consumer protection law — Federal and state “unfair or deceptive acts and practices” (UDAP) statutes, enforced by agencies like the Federal Trade Commission (FTC), prohibit deceptive omissions in advertising and sales, independent of any specific product-disclosure statute.

Importantly, selling something “as-is” does not eliminate the duty to disclose known material defects in most jurisdictions. An as-is clause typically shifts responsibility for unknown defects and the cost of repairs to the buyer — it does not give a seller a license to hide something they actually know about.

2. Real Estate: What Home Sellers Must Disclose

Real estate is the area of law where seller disclosure obligations are most detailed, most codified, and most frequently litigated.

Material defects

Nearly every state requires (either by statute or through case law) that a seller disclose known material defects in the property that are not readily observable. A material defect is generally defined as a problem that would have a significant negative impact on the value of the property, or that creates an unreasonable risk to people on the property. Pennsylvania’s regulatory code, for example, frames the seller’s disclosure obligation in almost exactly those terms, requiring sellers to disclose all known material defects that aren’t readily observable to a buyer.

What counts as “material” varies, but commonly disclosed categories include:

Structural issues — foundation cracks, settling, load-bearing wall problems
Water intrusion — roof leaks, basement flooding, past water damage, drainage problems
Mold — especially where it has caused property damage or health concerns
Pest infestations — termites, carpenter ants, rodents
Septic and sewer problems
Electrical, plumbing, and HVAC system defects
Environmental hazards — underground oil tanks, contaminated soil, radon, asbestos (depending on state)
Zoning violations or unpermitted additions
Neighborhood nuisances — known ongoing disputes, chronic noise issues, or hazards in some states

Sellers are not usually required to disclose cosmetic wear and tear (a scuffed floor, a loose doorknob) or patent defects that a buyer would obviously see during a normal walkthrough. Sellers also aren’t required to hire an inspector to hunt for problems they don’t already know about — the standard is generally actual knowledge, not “should have known through investigation.” That said, if a seller received an inspection report, or if a prior buyer’s inspection turned up an issue and the deal fell through, that seller now has actual knowledge and must disclose it going forward.

Some states go further:

California has one of the most detailed disclosure regimes in the country. The Real Estate Transfer Disclosure Statement (TDS) requires sellers to address a long checklist of items, and sellers must also address wildfire, seismic, and flood hazard zones where applicable. California courts have also held that neither an as-is sale nor a buyer’s own inspection excuses a seller from disclosing known material facts.
North Carolina requires sellers to complete a Residential Property Owners’ Association Disclosure Statement, and its courts have held sellers civilly liable for knowingly withholding or misrepresenting material latent defects.
Florida carves out a notable exception: under Florida Statute §689.25, a death on the property (from any cause, including homicide or suicide) is not considered a “material fact” that must be disclosed.
Colorado distinguishes between “latent defects” (which must always be disclosed if known) and broader “adverse material facts” (required under the standard Colorado Real Estate Commission contract forms).

Stigmatized properties and non-physical facts

States differ sharply on whether sellers must disclose non-physical stigmas — a death in the home, a registered sex offender living nearby, alleged paranormal activity, or the property’s use in a notorious crime. Some states affirmatively exempt sellers from disclosing these facts (as Florida does with deaths); others leave it more ambiguous. This is one of the clearest examples of why state-specific research matters before relying on general guidance.

Federal disclosure requirement: lead-based paint

One disclosure obligation applies nationwide, regardless of state law: the federal Lead-Based Paint Disclosure Rule (Section 1018 of Title X of the Residential Lead-Based Paint Hazard Reduction Act of 1992, implemented jointly by the EPA and HUD). For any home built before 1978, sellers (and landlords) must, before the sale contract is signed:

Disclose any known information about lead-based paint or lead-based paint hazards in the home, including their location and condition
Provide the buyer with the EPA-approved pamphlet, Protect Your Family from Lead in Your Home
Give the buyer a 10-day period (unless a different period is mutually agreed) to conduct a lead-based paint inspection or risk assessment at the buyer’s own expense
Include specific lead warning language and signed acknowledgments in the sales contract
Retain copies of the completed disclosure for at least three years

This rule does not require sellers to test for lead paint or to remove it if it’s found — it only requires disclosure of what the seller already knows, plus the buyer’s right to test. Certain properties are exempt, including housing built in 1978 or later, short-term leases of 100 days or less, housing for the elderly or disabled with no young children present, and properties already certified lead-free by a licensed inspector.

Consequences of non-disclosure in real estate

Sellers who conceal known material defects can face:

Rescission of the sale (the buyer returns the property and gets their money back)
Compensatory damages — repair costs, diminished property value, or the difference between what was paid and the property’s actual value
Punitive damages in cases of intentional concealment or fraud
Broker/agent discipline — real estate licensees who knew of a defect and failed to pass it along can face their own liability and licensing consequences

Statutes of limitations for these claims typically run three to six years from when the defect was discovered (or reasonably should have been discovered), not from the closing date — meaning latent problems that surface years later can still trigger legal exposure for the seller.

3. Vehicle Sales: The FTC’s Used Car Rule

For sellers who are in the business of selling used vehicles, the primary federal disclosure regime is the FTC’s Used Car Rule (formally the Used Motor Vehicle Trade Regulation Rule, 16 CFR Part 455), in effect since 1985 and revised most recently in 2016.

Who it applies to

The rule covers any dealer that sells or offers for sale more than five used vehicles in a 12-month period — a threshold low enough to capture nearly every commercial used-car lot, independent dealer, and franchised dealer that also sells used inventory. It does not apply to private individuals selling their own personal vehicle. The rule applies in every U.S. state except Maine and Wisconsin, which have their own equivalent state disclosure requirements.

What must be disclosed

The rule’s centerpiece is the Buyers Guide, a standardized window sticker that must be displayed on every used vehicle offered for sale, in plain view, before the vehicle is offered to the public. The Buyers Guide must disclose:

Whether the vehicle is sold “as is” (no warranty) or with a warranty
If a warranty is offered: whether it’s full or limited, the percentage of parts and labor costs the dealer will cover, which vehicle systems are covered, and the duration of coverage
The major mechanical and electrical systems on the vehicle and common problems buyers should look out for
A recommendation that the buyer obtain a vehicle history report and check for open safety recalls
A statement encouraging the buyer to get any promises in writing and to have the vehicle independently inspected before buying

Critically, the Buyers Guide becomes part of the sales contract and overrides any contradictory language elsewhere in the paperwork. If the sticker says the car comes with a warranty but the contract says “as is,” the dealer is legally bound by the warranty stated on the Buyers Guide. Dealers must give the buyer the original or a complete copy of the Guide at the time of sale, reflecting any final negotiated changes.

Separately, if a dealer offers a written warranty, the Magnuson-Moss Warranty Act and the FTC’s Warranty Disclosure Rule require that the warranty terms be spelled out in a separate written document, and prohibit the dealer from disclaiming implied warranties once a written warranty is offered.

Penalties

Violations of the Used Car Rule can result in significant civil penalties per violation (the FTC periodically adjusts this figure for inflation; it has been in the tens of thousands of dollars per violation in recent years), plus potential state-level unfair trade practices claims, which in some states allow for treble damages and attorney’s fees.

4. General Consumer Sales and Online Selling

Outside of real estate and vehicles, seller disclosure obligations come mainly from consumer protection law rather than a single dedicated statute.

The FTC Act’s ban on deceptive omissions

Section 5 of the FTC Act prohibits “unfair or deceptive acts or practices” in commerce. The FTC has long interpreted this to cover not just false statements but also material omissions — leaving out information in a way that would mislead a reasonable consumer. This applies broadly to advertising, product descriptions, pricing, and online sales.

For online and e-commerce sellers, common disclosure obligations that flow from this general principle include:

Clear and conspicuous pricing — no hidden fees, and any mandatory add-on costs (shipping, processing fees) disclosed before checkout
Accurate product condition — whether an item is new, used, refurbished, or a display model
Material connections — if a review or endorsement is paid for or the reviewer has a financial relationship with the seller, that connection must be disclosed
Country of origin and safety information, where applicable, especially for regulated categories like food, cosmetics, children’s products, and electronics
Return, refund, and cancellation policies, particularly for negative-option or subscription-based sales, which have their own additional federal disclosure rules
Warranty terms, if any warranty is offered, under the same general framework as the Magnuson-Moss Warranty Act

State consumer protection statutes

Every U.S. state has its own version of an unfair or deceptive trade practices act, and many go further than federal law — for example, requiring specific disclosures for door-to-door sales, timeshares, funeral services, or health club memberships. Some also provide a private right of action, meaning a consumer (not just a regulator) can sue directly for a seller’s failure to disclose.

Sale of goods and implied warranties

Under the Uniform Commercial Code (UCC), adopted in some form by every U.S. state, the sale of goods carries certain implied warranties — most notably the implied warranty of merchantability (that goods are fit for their ordinary purpose). A seller doesn’t have to affirmatively “disclose” this warranty, but sellers who want to sell “as is” and disclaim implied warranties generally must do so explicitly and conspicuously, often using specific statutory language, or the disclaimer may not hold up.

5. A Practical Disclosure Checklist for Sellers

Regardless of what’s being sold, sellers can reduce legal risk by following a few consistent practices:

When in doubt, disclose. Courts and regulators consistently favor buyers who can show a seller had actual knowledge of a problem and stayed quiet. If you’re unsure whether something is “material,” the safer course is almost always to disclose it and let the buyer decide.
Put it in writing. Oral disclosures are hard to prove later. Use your state’s standard disclosure form where one exists, and keep signed copies.
Don’t rely on “as-is” language alone. As-is clauses generally protect you from unknown problems, not ones you already know about.
Update disclosures if new information comes to light. If a buyer’s inspection reveals something and that deal falls through, you now have knowledge that must be passed on to the next buyer.
Keep records for several years. Many disclosure statutes require sellers to retain signed disclosure forms for a minimum period (often three years), and litigation over hidden defects can surface years after closing.
Check both state and federal requirements. Federal rules like the lead-paint disclosure or the Used Car Rule set a floor, not a ceiling — state law frequently adds more.
When selling online, disclose pricing and condition clearly before checkout, not buried in fine print or an easily-missed link.

6. Frequently Asked Questions

Does “as-is” mean I don’t have to disclose anything? No. In most states, “as-is” shifts the risk and cost of unknown problems to the buyer, but it does not excuse a seller from disclosing material defects they actually know about.

Do I have to disclose a death that occurred in the house I’m selling? It depends on the state. Some states, like Florida, specifically exempt this from the definition of a “material fact.” Others are less clear. Check your state’s specific disclosure statute.

Am I required to hire an inspector before selling my home? Generally, no. Most disclosure laws are based on what the seller actually knows, not what a professional inspection might reveal. However, disclosing the results of any inspection you’ve already had is typically required.

Does the Used Car Rule apply if I’m selling my personal car privately? No. The FTC’s Used Car Rule applies to dealers who sell more than five used vehicles in a 12-month period, not private individual sellers. Private sellers can still be liable under general fraud and state consumer protection law if they knowingly conceal a defect.

What happens if I don’t disclose a known defect and the buyer finds out after closing? Depending on the jurisdiction and the facts, the buyer may be able to sue for rescission of the sale, damages (such as repair costs or the diminished value of the property), and in some cases, punitive damages if the concealment was intentional.

Sources

U.S. Environmental Protection Agency — Real Estate Disclosures about Potential Lead Hazards
U.S. EPA — Lead-Based Paint Disclosure Rule (Section 1018 of Title X)
eCFR — 24 CFR Part 35, Subpart A: Disclosure of Known Lead-Based Paint Hazards Upon Sale or Lease of Residential Property
Federal Trade Commission — Used Car Rule
Federal Trade Commission — Dealer’s Guide to the Used Car Rule
Federal Trade Commission Consumer Advice — Buying a Used Car From a Dealer
eCFR — 16 CFR Part 455: Used Motor Vehicle Trade Regulation Rule
Pennsylvania Code — 49 Pa. Code § 35.335a, Seller Property Disclosure Statement
California Department of Real Estate — Disclosures in Real Property Transactions
Nolo — Required Disclosures When Selling U.S. Real Estate
FindLaw — Required Real Estate Disclosures When Selling Property
National Association of REALTORS® — Consumer Guide: Seller Disclosures
Colorado Lawyer (Colorado Bar Association) — Disclosure of Adverse Material Facts and Latent Defects in Real Estate Transactions

Note: This article summarizes general legal principles in the United States as of the last-updated date above. Real estate and consumer disclosure law is state-specific and subject to change; always verify current requirements with a licensed attorney or your state’s real estate commission or attorney general’s office before relying on this information for an actual transaction.