Marketplace listings: the single giveaway that a deal is fake

Reading about a scam in the abstract does almost nothing, because nothing you meet will look like the abstract version. What transfers is the shape: what you are actually looking at, and the one thing that settles it.

Each situation below is written from where you would be standing. None of them are real cases and none of them name anybody, because the useful part is the shape rather than the story. What each one gives you is a single check that resolves it, and an honest note on how often the innocent version turns up.

What to take away

• Almost every situation resolves on one question, and it is rarely the one that feels most urgent.
• The innocent version exists for most of these. Acting on the check costs you nothing when it does.
• Two situations here are never innocent. Learn those two and you have most of the value of the page.

Situations where you are buying

The price is well below everything comparable, and there is a reason. A move, a bereavement, a business closing. The reason is doing work: it makes the price make sense so you stop asking why it is low. Settled by: collection in person, paying at handover, nothing sent in advance. The innocent version is common, and it survives that condition without difficulty.

A deposit will hold it for you. Applies to rentals, vehicles, event tickets, and anything with more interest than supply. Settled by: seeing the thing first. If you cannot see it, there is nothing to hold. This one is worth being rigid about, because the deposit is small enough that people pay it to stop thinking about the decision.

An escrow service or protection program emails to confirm your funds are safe. Settled by: opening the platform's own app yourself and looking. Real payment protection is visible inside the account you already have. An email that arrives to reassure you about money is telling you where the money went.

The item is with a shipping agent because the seller has moved abroad. Settled by: not buying an item you cannot see from a person you cannot reach through anything except the conversation you are already in. There is no innocent version of this one that is worth the risk, because even when it is genuine you have no recourse.

A ticket or a code, sold as a number. Anything that is only a barcode can be sold to several people and works for whoever arrives first. Settled by: buying through the official resale route where one exists, and treating a private sale as a bet rather than a purchase.

The item is not what was described. More common than outright theft, and it is a dispute rather than a crime. Settled in advance by how you paid, which is the whole argument in marketplace scams.

Situations where you are selling

A buyer wants you to prove you are real by reading out a code they are about to send. Sometimes framed as an anti-bot check, sometimes as a verified-seller badge. This is one of the two that is never innocent. That code is arriving because somebody is standing at a sign-in or a sign-up screen using your number. Settled by: never, under any framing. The reasoning is in phishing scams.

A payment confirmation arrives as a screenshot. Settled by: your own banking app or the platform's own record. An image is not evidence of anything. This one has an innocent version, in that people do send screenshots out of habit, so the check is polite and quick.

Too much money arrives, and you are asked to send the difference back. To a different account, to a courier, to a third party. Settled by: refunding nothing. A genuine overpayment is reversed through the original method by the person who sent it, in full. This is the second one that is never innocent in the form it usually arrives in.

A message says your funds are held until you upgrade your account or confirm something. Settled by: opening the app rather than the link. Money you are owed does not need you to do anything to release it.

The buyer wants to arrange their own courier with their own label. Settled by: using your own shipping account. This one has a genuinely innocent version, especially for large items, and the cost of insisting is small.

The two that are never innocent

Worth separating them out, because everything else on this page is a judgment call and these two are not.

Reading out a code that was sent to you is always wrong. There is no legitimate transaction anywhere that requires it. The Federal Trade Commission's guidance on protecting accounts covers why the code carries that much weight.

Refunding an overpayment by a route other than the original payment is always wrong. Not usually wrong. Always.

Where careful people still lose

Two patterns account for most losses among people who already know all of the above.

The first is the deal that starts normally and changes at the last moment. Everything is fine through the negotiation, and the payment method shifts at handover with a plausible reason. By then you have spent the time, arranged the day, and the change feels like a detail. It is not a detail. It is the entire deal.

The second is doing a good check and then not acting on the result. People run a reverse image search, find the photograph on three other listings, and buy anyway, because the seller has an explanation. The check was the easy part. Acting on it is where it counts.

Reporting a situation you got out of

A near miss is still worth ten minutes. The platform can act on an account before it reaches somebody less careful, and the report is what lets it. The routes and what each one can do are in scam reporting and recovery, and consumer fraud reports in the US go to the FTC's report route.

If anything did move, work through the money and account steps in account security before you try to reconstruct what happened.

Common questions

Are these based on real cases?

No. They are composite shapes, deliberately, because a real case comes with details that make it feel specific and stop it transferring to the next one.

How do I tell the innocent version from the other one?

Usually you cannot, which is why every situation above is settled by a condition rather than a judgment. The condition works whether or not the person is genuine.

The seller got annoyed when I asked for a photograph taken now.

That is information, though not proof. People do get short with strangers. The point is that a genuine seller can produce it, and being annoyed does not stop them.

Is a low price always a warning sign?

No. Things genuinely go cheap. The warning sign is a low price plus a reason you did not ask for plus a payment method you cannot dispute.

I lost money on one of these. Is it worth reporting when the amount was small?

Yes. Small reports are how an account or a payment detail gets connected to a larger pattern, and nothing you can do afterwards is better spent.