Keep the product, its packaging, and the transaction record together. A convincing claim links the exact item delivered to a promise in the listing, then shows why that item cannot be genuine.

Start with the record. One clear manufacturer response may matter more than an expensive lab report, while blurry photos can prove almost nothing. Your next move depends on both the marketplace and the payment method.

This guidance is for U.S. consumers. eBay, Amazon, and PayPal run their own buyer-protection systems, while a credit-card billing dispute follows a separate issuer process and deadline. State law may offer other options, but a legal citation won't extend a marketplace deadline or replace its return instructions.

What a strong counterfeit claim has to show

Good claims answer four plain questions: What did the listing promise? What arrived? Which specific fact points to counterfeiting? What refund do you want?

There's no magic document. Several records can establish the story together.

Use a serial-number lookup as one part of the record, not as a final verdict. It may show an impossible format, a mismatch, or no production record.

Turns out, a copied genuine serial number can still pass a basic lookup. Ask what the check actually verified.

A genuine product may be defective, used, refurbished, gray-market, or unlike the listing. If counterfeiting isn't provable, describe the problem you can document instead: wrong model, undisclosed condition, missing parts, or material misrepresentation.

Build the evidence file before you submit a claim

Save everything before the listing or order page changes. Keep these records together:

• The order confirmation, receipt, payment record, tracking number, and seller details
• Screenshots or saved copies of the listing, including authenticity claims and photos
• Clear photos of the item, box, labels, serial numbers, seals, and shipping package
• Every message with the seller, platform, manufacturer, authenticator, or payment provider
• Return instructions, tracking records, reports, and refund offers

Photograph the item in good light from several angles. Include close-ups of stitching, printing, labels, plugs, seals, ingredients, and any feature that differs from an official reference.

Keep the original files. Make copies before uploading anything.

Don't alter, clean, repair, or discard the product. If it could be unsafe, stop using it and store it away from people and pets. Avoid posting a full serial number publicly; use the platform or manufacturer's secure channel instead.

An eight-step process for proving the item is counterfeit

1. Set the item aside if safety is a concern. Keep the product, packaging, shipping label, and accessories together.
2. Record its condition right away. Take photographs before attempting a repair, test, return, or further use.
3. Preserve the transaction. Save the listing, order details, payment statement, seller messages, and delivery date.
4. Compare it with an official reference. Use the brand's website, manuals, support channel, or authorized-retailer information.
5. Request targeted verification. Ask the manufacturer or a qualified authenticator to address the specific serial, construction, packaging, or material discrepancy.
6. Contact the seller through the platform. State what arrived, identify the evidence, and request a refund without making claims you can't support.
7. Open the correct dispute before its deadline. Use the transaction page and upload a short, organized set of strong documents.
8. Follow return instructions exactly. Use tracking if required, keep the shipping receipt, and don't close the case until the refund is recorded.

To be honest, a lab report may be the wrong first expense. For a low-value item, clear photographs and manufacturer confirmation may support a practical claim; a lab report is more useful when materials, ingredients, safety, or a high-value expert opinion are central.

Which refund route controls the dispute?

The payment path decides which process can address the refund. Marketplace claims, PayPal disputes, and credit-card billing disputes are separate tracks.

eBay's policy lists a 30-calendar-day window after the estimated or actual delivery or collection date for covered issues. An appeal may be submitted within 30 calendar days of eBay's decision. Read the policy tied to your transaction because eligibility and return directions can differ.

Amazon's official help says the A-to-z Guarantee applies to purchases sold and fulfilled by third-party sellers. Its conditions include contacting the seller more than 48 hours earlier without a resolution and having a last possible delivery date within 90 days, along with other requirements.

Don't carry a deadline from one route to another. Thing is, a PayPal transaction funded by a credit card can involve two separate processes, and a chargeback isn't an official finding that the product was counterfeit. Tell each provider the full history, including any refund, return, or earlier decision.

For a U.S. credit-card billing dispute, the FTC's credit-card guidance says written notice must reach the issuer within 60 days after the first bill containing the error. If your address changed, the guidance says you must have notified the issuer in writing at least 20 days before the billing period ended to use these protections.

The issuer generally must acknowledge the complaint within 30 days and resolve it within 90 days. This process is for credit cards. It doesn't cover every debit, bank-transfer, prepaid, or PayPal-balance payment.

Write a short, evidence-based claim

Write for a busy reviewer. Put the order number, delivery date, item description, specific discrepancy, and requested remedy near the top.

I received order [number] on [date]. The listing represented the item as [brand and model]. The item appears counterfeit because [specific, verifiable discrepancy]. Attached are photographs, the listing, the order record, and [manufacturer or expert verification]. I am requesting a full refund under the applicable buyer-protection policy. I will preserve the item and follow the platform's return instructions.

Use neutral wording. "The serial format does not match the manufacturer's response" is stronger than "This seller is a criminal."

The file may get messy, and it probably will. Put the decisive fact first, then place the supporting records behind it. If uploads are limited, start with the strongest three or four documents.

If the platform denies the claim

Read the stated reason before appealing. A denial may involve timing, the wrong dispute category, missing seller contact, incomplete return tracking, or unclear files rather than a conclusion that the item is authentic.

If the claim only says "looks fake": identify the exact feature, official reference, or written verification that supports the claim.

If a serial-number lookup passed: explain that the lookup doesn't authenticate the physical item, then add construction, packaging, or brand evidence.

If you're waiting for a perfect expert report: file before the deadline with the evidence available, and add documents later if the platform permits it.

If you returned the item informally: provide tracking, photographs of the package, and every delivery record.

If the seller promises a refund outside the platform: keep the promise in writing and follow the platform's instructions before closing the dispute.

If the platform requests more information: answer each question directly instead of uploading an unorganized archive.

Appeal through the available channel and keep the facts consistent. If the loss is substantial, the product caused an injury, or the seller is threatening you, consider speaking with a licensed attorney or local consumer-protection office.

Safety concerns and reporting

Counterfeits can be unsafe. The U.S. Customs and Border Protection guidance on counterfeit goods warns that they may contain substandard materials or components and create health and safety risks.

Don't keep testing a suspect product on your body, ingest it, or connect it to equipment if doing so could cause harm. Stop using it and preserve it as evidence.

Report the listing to the marketplace. You can also use the FTC's complaint information to report suspected fraud or deceptive conduct. An agency report is a separate reporting step; it doesn't replace a marketplace refund request or the credit-card billing process.

Questions consumers commonly ask

Is a serial-number check enough?

Usually not by itself. A copied serial can look valid, and a database may confirm only that the number format exists.

Do I need a lab report?

No universal rule requires one for every counterfeit claim. A lab report is most useful when composition, ingredients, materials, or safety are disputed; an expert authentication may fit branded-goods questions better.

Can a seller's receipt prove the item is authentic?

Not on its own. A receipt may help establish provenance, but it doesn't necessarily show that the particular item you received is genuine.

Can I dispute the charge after the marketplace rejects my claim?

You can ask your credit-card issuer about its separate billing-error process if the facts fit and you meet the deadline. Give the issuer the full history, including the marketplace decision, and don't seek payment twice for the same loss.

Put the order record, saved listing, payment statement, photographs, and written verification in one folder today. Then check the correct deadline and submit the shortest accurate claim you can support.