If a product is defective, stop using it if it may be unsafe, keep the item and packaging, and contact the seller in writing. Ask for a specific remedy: repair, replacement, or refund. Keep the order record and every response.

For U.S. purchases, there's no blanket federal 30-day refund rule. The seller's return policy, written or implied warranties, state law, and payment method may each matter. For goods bought from an EU trader, the seller generally owes a free two-year legal guarantee, subject to country-specific rules and exceptions.

Quick steps for filing a defective product complaint

  1. Stop using an unsafe item. If it sparks, overheats, leaks, breaks, or could injure someone, don't keep testing it.
  2. Photograph and record the defect. Capture the product, packaging, serial number, labels, and the problem in use if it's safe to do so.
  3. Collect purchase evidence. Save the receipt, order confirmation, card statement, warranty, delivery record, and product listing.
  4. Check the rule that applies. Review the retailer's return policy, written warranty, marketplace protection terms, and the law where you bought the product.
  5. Contact the seller in writing. Describe the problem clearly and state whether you want a repair, replacement, refund, or another remedy.
  6. Follow approved return instructions. Get a return authorization, shipping receipt, and tracking number before sending anything back.
  7. Escalate before a deadline expires. Ask for a supervisor, contact the manufacturer or warrantor, use a qualifying payment dispute, or file with an appropriate agency or court.

A supposed universal 30-day law isn't the default. The FTC's guidance on resolving problems with businesses says many stores set return limits such as 30 or 90 days. Those are usually store-policy deadlines, not a single federal refund rule.

What counts as a defective product?

A product may be defective or legally nonconforming if it:

Accidental damage, misuse, unauthorized alterations, and ordinary wear may be excluded from a return policy or warranty. An allergic reaction to a cosmetic is a health and safety issue, but it doesn't automatically prove a manufacturing defect. Record the reaction and product details instead of guessing at the cause.

U.S. rules for defective products

A retailer's return policy

U.S. federal law generally doesn't require every retailer to accept a return or issue a refund for every defective purchase. A written policy may set the return window, condition requirements, exclusions, restocking terms, and refund method.

A change-of-mind return policy isn't the same as a warranty claim. A no-returns notice may affect a voluntary return, but it doesn't automatically eliminate rights under an applicable warranty or state law.

Written and implied warranties

A written warranty should explain what's covered, how to make a claim, and which repairs, parts, uses, or maintenance requirements are excluded. Read it before paying for an independent repair because unauthorized work can complicate the claim.

The FTC's warranty guidance explains that an implied warranty of merchantability generally means the seller promises the product will do what products of that type are supposed to do. State law determines how implied warranties apply and whether they can be limited or disclaimed.

The Magnuson-Moss Warranty Act regulates certain written consumer warranties and warranty disclosures. It doesn't require a business to offer a written warranty or guarantee an automatic refund. If the warranty promises repair or replacement first, the warrantor may be allowed to follow that process before a refund becomes available.

Who should pay: retailer or manufacturer?

Start with the retailer when you want to use its return policy. Contact the manufacturer or named warrantor when the written warranty directs you there or the retailer says the warranty claim must be handled by the manufacturer.

Don't assume both must offer the same remedy. A manufacturer warranty, retailer return policy, service contract, state-law claim, and marketplace buyer-protection program are separate paths.

For a serious injury or property damage, a routine refund request may not address the full issue. Preserve the product, packaging, receipts, medical records, and repair reports, and consider qualified legal help for a significant claim.

EU rights for defective goods

For most goods bought from a trader in the EU, consumers have a minimum two-year legal guarantee at no cost. The seller, not necessarily the manufacturer, is normally responsible for putting the problem right. The Your Europe consumer rights guidance explains that the guarantee applies to purchases made in shops and online.

The usual first remedies are:

National rules can affect the evidence required, notification periods, remedies, and presumptions about when a defect existed. For second-hand goods, some countries allow the parties to agree to a shorter guarantee period, but it generally can't be reduced below one year. Check the rules in the country where the purchase was made. The European Consumer Centre Belgium explanation of the legal guarantee gives examples of these national differences.

The EU's 14-day withdrawal period for many online and distance purchases is different from the legal guarantee for defective goods. It can let you cancel without proving a defect, but exceptions apply. Don't use the 14-day rule as a substitute for a defect claim, and don't assume it applies to in-person purchases.

These EU rules generally concern purchases from traders. A transaction with a private individual may not receive the same consumer protection. UK purchases also require separate UK guidance; the EU two-year wording shouldn't be applied automatically to them.

Evidence checklist for a faulty product complaint

Create one folder for the claim and save:

Keep the product in its current condition. Don't disassemble it, throw it away, or send it to an unauthorized repairer before the seller or warrantor gives instructions. If a return is approved, photograph the item and package again, use the required label, and retain the carrier receipt until the refund is posted.

A receipt isn't the only useful proof, but a card statement alone may not identify the item. Combine it with an order email, loyalty-account record, shipping notification, serial number, or seller account history.

How to complain through Amazon, Walmart, or eBay

Marketplace procedures change by order, seller, product category, and country. Use the policy and deadline displayed for the transaction rather than relying on a general return claim found online.

Platform Practical process Limit to watch
Amazon Open the order, choose the return, replacement, or problem option, select the most accurate defect reason, and upload clear evidence. If a third-party seller is involved, keep the conversation inside the platform. Eligibility and deadlines can differ by item and seller. If the seller doesn't resolve the issue, use the buyer-protection route shown for that order before its deadline.
Walmart Check whether the item was sold by Walmart, fulfilled by Walmart, or sold by a Marketplace seller. Start from the order page or customer-care return route and save the confirmation. Walmart's Marketplace returns policy separates in-store, Walmart.com, customer-care, and Marketplace processes. Don't assume one timing rule applies to all orders.
eBay Open the purchase in your purchase history, select the issue that accurately describes the defect or mismatch, attach photos, and follow the return instructions. Buyer-protection terms and deadlines are transaction- and site-specific. Keep the case open until the refund or replacement is confirmed.

Don't mark an item as changed my mind when it's defective or not as described. An inaccurate reason can put the claim under the wrong policy. Don't close a marketplace case merely because a seller promises to refund you; wait until the refund appears or the replacement arrives.

Complaint message template

Use a factual message and request the remedy allowed by the applicable policy or law. Don't cite a statute unless you've checked that it applies to your purchase.

Subject: Defective [product] - order [number]

Hello [seller or support team],

I bought [product and model] on [date]. The order number is [number].

The problem is: [describe exactly what happens, when it started, and the conditions of use]. The item was used according to [the instructions or normal conditions]. I have attached [photos, video, purchase proof, and any inspection report].

I am requesting [a repair, replacement, refund, or price reduction] under [the applicable return policy, written warranty, or legal guarantee]. Please confirm the next step and provide any return instructions by [date].

Please keep this message with case number [number]. I will retain the product and packaging until you confirm how it should be handled.

Thank you,

[Name]

[Email and phone]

For an EU purchase, ask for a free repair or replacement first when that's the normal legal remedy. For a U.S. purchase, quote the relevant warranty or return-policy language if it supports your request. A written request creates a clear record without making an unsupported threat.

What to do if the seller refuses or stops responding

Keep a timeline with the date, contact method, agent, promise, and next deadline. The FTC recommends explaining the problem clearly, stating what you want, keeping notes, and saving copies of online chats and forms.

Escalate in this order:

  1. Send one concise written follow-up. Attach the original complaint and identify the promised response date.
  2. Ask for a supervisor or corporate review. Request the exact policy or warranty exclusion being used.
  3. Contact the manufacturer or warrantor. Include the retailer's case number and proof of purchase.
  4. Use the marketplace's buyer-protection process. Submit before the platform's displayed deadline.
  5. Contact your payment provider promptly. A credit-card billing dispute, debit-card claim, ACH reversal, prepaid-card process, or payment-app dispute has different rules and deadlines. A chargeback isn't a guaranteed refund and doesn't replace the seller complaint.
  6. Report serious conduct or a safety problem. A state attorney general, the FTC, or the relevant product-safety agency may accept a report. An agency report can help identify patterns, but it usually isn't an order requiring a business to refund one transaction.
  7. Consider small claims court or another formal route. Filing limits, fees, service rules, arbitration clauses, and deadlines vary by state or country; some states set small-claims limits as high as $25,000.

For a cross-border EU purchase, check the national consumer authority or European Consumer Centre route available in the relevant country. If the purchase involved injury, a fire, a vehicle safety failure, or substantial property damage, preserve the evidence before negotiating a settlement or signing a release.

Special cases

Defective electronics or a swollen battery

Stop using a device that's swollen, smoking, sparking, or unusually hot. Don't mail or dispose of a damaged battery until the seller or manufacturer provides safe-handling instructions. Photograph the model and serial number from a safe position and keep the shipping package if it isn't hazardous.

Auto parts

Don't drive a vehicle if a failed part affects braking, steering, fuel, tires, restraint systems, or another safety function. Ask a qualified mechanic for a written diagnosis and keep the failed part, installation invoice, mileage, maintenance records, and photos. A warranty claim, retailer complaint, and vehicle-safety report are separate actions.

Cosmetics and allergic reactions

Stop using the product and seek medical care for a severe or worsening reaction. Save the container, ingredient list, batch or lot code, purchase proof, and photos of the reaction. Report a serious adverse event through the appropriate health authority if advised. A safety report helps regulators monitor risks; it doesn't by itself guarantee a refund.

No receipt

Ask the retailer what alternative purchase evidence it accepts. An order email, card statement, loyalty record, delivery history, warranty registration, or serial number may help, but the retailer's policy or warranty can still require additional proof.

Common questions

How long do I have to return a defective item in the U.S.?

There's no single federal deadline for every defective product. Check the retailer's return window, the written warranty period, and applicable state law. Report the problem promptly because waiting can make evidence and payment disputes harder.

Can I demand a refund instead of a repair?

Not always. A warranty or consumer law may allow the seller to repair or replace the product first. State law, the warranty terms, the severity of the defect, and whether earlier repairs failed can affect the remedy.

Does a credit-card chargeback guarantee my money back?

No. Contact the card issuer quickly and ask whether its billing-dispute process covers the transaction. The issuer's rules and deadline are separate from the seller's return policy, and debit, ACH, prepaid, and payment-app transactions follow different procedures.

Does the EU two-year guarantee mean a manufacturer must refund me immediately?

No. The legal guarantee normally starts with a free repair or replacement through the seller. A price reduction or refund may become available if those remedies are impossible, disproportionate, unsuccessful, or unreasonably delayed.

Will an FTC complaint get my individual refund?

Usually, an agency complaint is a report about business conduct rather than a direct refund process. Send the seller a written demand first, then use the agency, payment-provider, marketplace, or court route that fits the dispute.

Before you ship the product, save your complaint, photographs, return authorization, and tracking receipt. Then check the seller's written response date and escalate through the next available channel if it passes without a resolution.