An online marketplace seller complaint is usually easiest to resolve through the order record, not a public review. Save the listing and delivery details, message the seller with a specific request, then use the marketplace's case process if the response is inadequate. If that fails, your payment provider may offer a separate dispute route.

The steps below assume a U.S. consumer purchase. Marketplace policies vary by platform, country, order, and payment method. A marketplace buyer-protection policy is separate from U.S. shipping rules and credit-card billing-dispute rights. As the Federal Trade Commission explains, some marketplace operators leave payment, delivery, returns, and refunds to the buyer and seller, while others provide a formal complaint process.

Before escalating

1. Identify the problem and the remedy you want

Classify the issue clearly:

Decide whether you want a replacement, a return and refund, or a partial refund. A specific request is easier for the seller and marketplace to evaluate than a general accusation.

2. Save evidence before the listing changes

Create a folder for the complaint and keep:

Keep the product and packaging until the dispute is closed. Redact your full card number and other sensitive information before uploading documents. Submit only accurate records that relate to the order.

3. Contact the seller through the marketplace

Use the platform's internal messaging system or order-help form. Explain what happened, refer to the listing, and state the solution you want. Avoid insults, threats, or unsupported claims.

You can write:

Order [number] arrived on [date], but [brief description of the problem]. The listing says [relevant fact]. I'm requesting [a refund, replacement, or return instructions]. Please confirm the next step in this message thread.

If you speak by phone or email, summarize the conversation in the platform's message thread. That gives the marketplace a clearer record if you need to escalate.

4. Open an official marketplace request

If the seller doesn't respond or the proposed solution isn't acceptable, use the order page's Help, Return, Report a problem, or equivalent option. Include:

  1. What the listing promised
  2. What you received or failed to receive
  3. When you contacted the seller
  4. The remedy you requested
  5. The evidence supporting your account

Follow the deadline shown in the order or case page. Don't assume a deadline from Amazon applies to Etsy, eBay, or another service.

5. Escalate the payment only when appropriate

If the marketplace case fails, or the seller charged you for merchandise you never received, contact the payment provider. The process depends on whether you used a credit card, debit card, prepaid card, bank transfer, or payment app.

Don't pursue duplicate refunds for the same amount. Tell the marketplace or card issuer if a refund arrives after you open a payment dispute.

What to do for common marketplace complaints

The order never arrived or is late

First compare the tracking record with the latest estimated delivery date. If the delivery window has passed, report the missing order through the marketplace and ask the seller to investigate.

U.S. sellers who take orders online are also subject to the FTC's Mail, Internet, or Telephone Order Merchandise Rule. The rule requires a seller to have a reasonable basis for shipping within the advertised time. If no shipping time is stated, the default is generally 30 days. If the seller cannot meet the promised time, the seller must obtain your consent to a delay or refund payment for the unshipped merchandise.

That rule is not the same as a marketplace's missing-package procedure. A platform may ask for tracking details, require you to wait until an estimated date passes, or apply separate eligibility conditions. Keep a copy of the original delivery promise rather than relying only on a later tracking estimate.

If tracking says delivered, provide the delivery scan and explain any relevant facts, such as an incorrect address, a carrier exception, or a package that was marked delivered before the expected date. Ask the seller and marketplace to review the order record.

The item is damaged, wrong, or not as described

Photograph the item from several angles, including the shipping box, internal packaging, label, serial number, and the specific defect. Compare the product with the listing's description and photographs.

Ask for the remedy that fits the problem:

Don't return the item to an address sent casually by email if the marketplace has a formal return process. Use the platform's instructions so the return and tracking can be connected to the order.

You were billed for something you never received

Check the order history, merchant name on the statement, and any household account before treating the charge as unauthorized. If you did place the order but never received the merchandise, contact the seller and marketplace first if their deadline allows.

For a qualifying credit-card billing error, the FTC says you should dispute the charge in writing within 60 days after the first statement containing the error was sent. Include the transaction date, amount, seller, reason for the dispute, and copies of relevant evidence. The issuer must generally acknowledge the dispute in writing within 30 days unless it has already resolved the issue, and it must resolve the dispute within two billing cycles, not more than 90 days.

During the investigation, you generally don't have to pay the disputed amount or related finance charges, but continue paying any undisputed balance and follow the issuer's instructions. The 60-day rule described here is for credit-card billing errors. Don't automatically apply it to debit cards, prepaid cards, bank transfers, or payment apps; contact those providers promptly and ask which dispute process applies.

The FTC's guidance on billing errors and unordered products explains the distinction between goods you ordered but didn't receive and products you never ordered.

How to complain on Amazon, Etsy, and eBay

Amazon

Start from the order page and use Buyer-Seller Messaging. Give the seller a reasonable opportunity to resolve the problem, but don't wait past the deadline shown in your account.

Amazon's published A-to-z Guarantee conditions for one marketplace say that a buyer must first contact the seller and, in some circumstances, wait more than 48 hours without a satisfactory resolution. The same guidance lists timing conditions for some non-delivery claims, including the latest estimated delivery date and a delivery confirmation.

Those conditions are marketplace-specific and may not be the controlling terms for a U.S. order. Use the A-to-z link and deadline displayed in your own Amazon account. When submitting a claim, attach the order information, listing evidence, tracking, photos, and the message history. Keep your explanation short, factual, and in date order.

Etsy

Use Help with Order from the order page and contact the seller through Etsy Messages. Etsy says that if the problem remains unresolved 48 hours after you first messaged the seller, you may be able to ask Etsy to step in.

Etsy's case-resolution guidance emphasizes shipping proof and tracking connected to the address on the Etsy receipt or an address agreed in Etsy Messages. Upload the photographs, listing details, tracking, and return information Etsy requests.

Etsy Purchase Protection is not an automatic refund for every late or damaged order. Its Purchase Protection terms list eligibility requirements and say that items late or not received because of buyer delay or refusal to pay delivery charges don't qualify.

eBay

If the estimated delivery date has passed, report that the item hasn't arrived from the order or purchase history. eBay's buyer returns and refunds guidance says sellers should respond within three business days. If the seller can't resolve the request, you can ask eBay to step in.

For an item that is damaged, wrong, or not as described, open the appropriate return or refund request and provide photographs and a clear description. The reason for the return can affect who pays return shipping, so select the most accurate reason and keep proof of postage.

Other marketplaces and standalone stores

Walmart, Poshmark, Mercari, Facebook Marketplace, and other services have different protection rules and response windows. Open the order's buyer-protection or refund terms and use the support route tied to that transaction.

If you bought from a seller's standalone website rather than a marketplace checkout, there may be no marketplace case system. Start with the merchant's posted return policy, then contact the payment provider if the merchant doesn't resolve a qualifying problem. If you paid outside the platform, don't assume the marketplace can recover the money or verify the transaction.

Build a complaint that is easy to review

A reviewer should be able to understand the dispute without searching through dozens of messages. Use a short timeline:

Use neutral wording. The listing described a new, blue, 12-inch item, but the delivered item is used, red, and 10 inches is stronger than calling the seller a scammer when the evidence supports the first statement.

Never send more money to release a refund, pay a supposed insurance fee, or unlock a return. Report that request through the platform's safety or reporting tool and contact the payment provider.

What controls the dispute, and what doesn't

Three separate systems may affect the outcome:

  1. Marketplace policy: Sets the case route, evidence requirements, response windows, and eligible remedies.
  2. Seller's listing and terms: Shows what was promised about condition, delivery, returns, and price. A seller's private promise may be harder to prove than a promise recorded in the listing or platform messages.
  3. Payment-provider rules: Determine whether a card, bank, or payment-app dispute is available and what deadline applies.

A negative review can warn other shoppers, but it doesn't replace a return request, marketplace case, or billing dispute. Likewise, a marketplace case decision is not automatically a legal determination about every possible claim. If a significant amount of money or suspected fraud is involved, consider getting advice from a qualified consumer-law professional or your state consumer-protection office.

Reduce the risk before buying

The best complaint is one you can document from the start:

Open your order now, save the listing and messages, and note both the marketplace deadline and the date on your payment statement. Those two dates determine your next escalation step.