A strong defective-product claim tells a short, dated story: what you bought, what the seller promised, what failed, and how you asked for a remedy. Start by saving the order record, product listing, original photos or videos, messages, warranty terms, and return tracking. Add a repair or inspection report if the cause of the problem is disputed.

This article is for U.S. consumers. A seller's return policy, a written warranty, a marketplace guarantee, a credit-card dispute, and state law are separate systems. Meeting one deadline usually doesn't extend another.

What your evidence needs to show

A refund, repair, or replacement request is easier to evaluate when it establishes that:

  1. You bought or received the specific item. Provide the receipt, order number, payment record, model, and serial number.
  2. The item was defective or materially different from its description. Compare its condition, features, or performance with the listing, packaging, instructions, or warranty.
  3. You used or installed it reasonably. If the problem appeared after setup, record that you followed the instructions and used the correct accessories.
  4. You notified the seller promptly. Keep the date, message, response, and any proposed repair or replacement.
  5. You requested a specific remedy. Say whether you want a refund, repair, replacement, or another solution available under the applicable terms.

A photo may show damage without proving when it happened. A receipt proves a transaction without showing that the item was faulty. A dated file that combines both types of evidence fills those gaps.

Evidence checklist for a defective-item dispute

1. Purchase and product records

Save these records before a listing or account page changes:

The listing is especially important when the item is not as described, rather than merely broken. Keep the original page and record when you saved it.

2. Photos and videos

Take clear, unedited images as soon as you notice the problem. Include:

Keep the original files. Phone timestamps and file metadata can help establish a timeline, but they aren't conclusive by themselves. Don't use filters, misleading labels, or edits that could raise questions about authenticity. If you make a cropped copy for an upload, keep the untouched original as well.

Stop testing a product that is smoking, overheating, sparking, leaking, or otherwise unsafe. Preserve it without creating another hazard.

3. A dated timeline

Create a simple log with one line for each event:

Date Event Supporting record
Date received Package delivered Tracking record
Date first used Item set up according to instructions Setup notes or video
Date problem found Describe the failure precisely Photo, video, or error screen
Date reported Contacted seller or platform Email, chat, or case number
Date returned Sent item under approved instructions Tracking and receipt

"Stopped working" is less useful than a specific description. Record what happened, what you tried, and whether the same problem occurred again.

4. Repair and inspection records

A technician's note can be valuable in a high-value or technical dispute. Ask the repair shop or inspector to identify:

An itemized diagnostic report is stronger than a receipt that only says "broken." Don't ask a technician to reach conclusions outside their expertise.

Before opening, modifying, or repairing the product, read the warranty. The FTC's warranty guidance explains that warranties may cover broad or narrow problems and that coverage details, limitations, and repair procedures should be in writing. Check whether the warranty requires use or maintenance according to its instructions.

5. Communications and return proof

Keep every interaction with the seller, including:

The FTC advises consumers to keep notes and copies of what they send while trying to resolve a problem. Its consumer problem-solving guidance also provides a complaint-letter approach.

Which rule or process controls the claim?

The evidence you need depends on where you make the claim:

Route What usually controls it Useful evidence
Seller return request The seller's posted return terms and deadline Order record, listing, defect photos, return authorization
Written warranty Warranty coverage, exclusions, and repair procedure Warranty, serial number, diagnosis, proof of purchase
Marketplace protection The marketplace's current policy and case deadline Order page, listing, messages, photos, tracking
Credit-card dispute The card issuer's process and applicable network or legal rules Statement, merchant correspondence, evidence of the defect
Small claims court State law, court rules, contract terms, and admissible evidence Originals, copies, timeline, witnesses, invoices
Regulatory complaint The agency's complaint process and jurisdiction Records showing the product or business problem

A platform decision isn't a court ruling. A card issuer's temporary credit or final decision also doesn't necessarily establish that the seller violated state law.

A warranty isn't automatically the same as a store return policy. A warranty may promise repair or replacement instead of a refund. Check the written terms before requesting a remedy they don't offer.

Amazon, eBay, and PayPal disputes

Amazon A-to-z claims

Amazon's A-to-z rules can vary by marketplace, order, and claim reason. Start with the claim flow connected to the order and follow any instruction to contact the Marketplace seller.

The linked Amazon A-to-z Guarantee page is for Amazon France, not a universal U.S. rule. It describes, in listed circumstances, contacting the seller more than 48 hours before applying and includes a delivery-related condition involving 90 days or less. Check the terms displayed for your country and order instead of using those figures as a U.S. deadline.

Upload concise, date-ordered evidence:

eBay Money Back Guarantee

Open the issue through the order page and choose the reason that accurately describes the problem, such as an item that doesn't match its listing. Keep the listing, messages, photos, and tracking together.

The official eBay Money Back Guarantee policy contains transaction-specific reporting rules and says that a buyer or seller may appeal a decision within 30 calendar days. Policies can vary by marketplace and transaction, so use the deadline shown in the case rather than relying on a general return window.

If eBay authorizes a return, follow its shipping instructions exactly. Photograph the item and package before sending them, and keep the tracking record.

PayPal transactions

PayPal's dispute process is separate from a card issuer's process. Open the transaction's Resolution Center instructions, note the deadline shown there, and upload the order record, listing, seller messages, and defect evidence.

Don't assume that a PayPal deadline extends the deadline for a credit-card dispute, or the reverse. Avoid opening duplicate claims without checking the applicable terms. If another provider has already refunded you, describe that accurately.

Credit-card disputes for defective goods

A chargeback is a payment dispute handled through the card issuer and network. It isn't a guaranteed refund or a finding that the seller is legally liable.

Contact the card issuer promptly and ask:

State that you authorized the purchase if you did. A product-quality dispute shouldn't be reported as an unauthorized transaction. Attach the statement, order proof, defect evidence, listing, seller communications, and return records. Explain the remedy you requested and the seller's response.

Don't assume that a store's return period, an Amazon deadline, or a frequently quoted card-network period is the deadline for your issuer. Debit-card, prepaid-card, bank-transfer, and credit-card procedures aren't interchangeable.

A practical escalation sequence

  1. Make the item safe. Stop using it if continued use could cause injury or further damage.
  2. Preserve its condition. Keep the product, accessories, packaging, and labels unless disposal is necessary for safety.
  3. Build one evidence folder. Use subfolders for purchase records, the listing, photos, communications, technical records, and shipping.
  4. Read the controlling terms. Find the return window, warranty remedy, exclusions, notice requirement, and platform deadline.
  5. Write to the seller. Describe the defect, attach the key evidence, and request a clear remedy.
  6. Return the item only as instructed. Use the required carrier and tracking, and keep proof of delivery.
  7. Escalate before a deadline expires. Use the marketplace process or contact the payment provider even if the seller has stopped responding.
  8. Consider court or a regulator. If the amount justifies it, check your state's small-claims limit, filing rules, and deadline. The FTC says limits vary by state and can be as high as $25,000 in some states. A regulatory complaint is separate from recovering your money.

If the product caused bodily injury, property damage, or a serious safety concern, preserve medical, repair, and incident records. A refund file may not be enough to establish liability for an injury claim.

Message template for the seller

Subject: Defective [product] - order [number]

I purchased [product, model, and serial number] on [date] and received it on [date].

The problem is: [clear description of what happened, when it happened, and what steps you took]. The listing or warranty described the item as [relevant promise].

Attached are [receipt or order record, listing, photos or video, warranty, repair report, and other evidence].

I am requesting [refund, repair, or replacement]. Please confirm the next step and any return instructions by [date].

Name:
Order number:
Preferred contact:

Choose a response date that gives the seller a reasonable opportunity to act. Don't claim that a specific legal deadline applies unless you've verified it for your state and situation.

Common questions

Are photos and videos enough?

They can show what the defect looks like, but they may not prove ownership, timing, or cause. Add the receipt, listing, messages, and a technician's report when the item is expensive, technical, altered, or connected to an injury.

Do I need an expert report?

Not always. A simple visible defect may be clear from photographs and the seller's own inspection. An independent report is more useful when the seller says the item was misused, the failure is internal, or the remedy is disputed.

Should I throw away the defective item?

Not unless keeping it creates a safety or health risk. The seller, platform, insurer, or court may need to inspect it. Ask for written disposal or return instructions and document the condition first.

What is the single most important deadline?

There isn't one universal deadline. Check the seller's return terms, warranty, marketplace case window, card issuer's dispute procedure, and your state's court rules. Use the earliest applicable deadline and start collecting evidence immediately.

Open the applicable order, warranty, marketplace, or card account page now, record its deadline, and save a copy of the terms before sending your complaint.