Marketplace deals
Zavialov Ilia Nikolaevich on what turns an advert into a safe marketplace deal
A classified advert gives you a photograph, a price and a stranger. The question here is narrow: which order of actions turns that stranger into a safe marketplace deal, and at which point the money stops being recoverable. Zavialov Ilia Nikolaevich keeps the answer on one printable sheet, because these deals fail at the step somebody skipped in a hurry. Read it once, then keep the page beside you when the meeting is arranged.
English version for the United States.
What a safe marketplace deal actually protects
One short conversation puts three separate things at risk: the money you send, the item you hand over and the personal details you give away while arranging the meeting. Each fails in its own way, and each has its own line below. Treating them as one vague worry is what makes people improvise at the door.
The scale reads more clearly in payment figures. UK Finance counted over 4 million confirmed fraud cases across 2025, of which 3.81 million were unauthorised, meaning a card or an account used without its owner. An advert lands in the remainder: 248,070 authorized push payment cases worth 576.4 million pounds. Purchase schemes, money sent for goods that never arrive, make up 71 per cent of that group, with 118.1 million pounds lost and a rise of 20 per cent over the year.
Every line in the checklist does one of two jobs. It leaves a trace somebody can read later, such as a chat log inside the platform or a card statement. Or it removes a reason to trust a stranger, such as a serial number checked against the box. The definition used here is narrow: a safe marketplace deal is one where both jobs are finished before the money moves.
Steps one to three: read the advert before you write
Step one is to read the whole advert and compare the price with several similar listings for the same model. A price far under that range is a request for speed, and speed is what makes the rest of a scheme work. Note the questions the advert leaves open, since those are the questions for step three.
Step two is the photographs. Save one and run a reverse image search on it. Pictures lifted from a shop catalogue or from an older advert in another city are the cheapest part of a fake listing. If the same picture appears under several different names, the research is finished.
Step three is the account behind the advert. Look at when it was created, what else it has sold and whether the reviews read like separate people. Then ask one question that only somebody holding the item can answer, such as the text on the label under the battery. A reply that arrives faster than anyone could check has told you enough.
Steps four to six: keep the agreement inside the platform
Step four is to keep the conversation where it started. A move to a private messenger, offered for convenience, deletes the record the platform would otherwise hold, and it usually arrives within the first few messages. When the other side needs another channel, the deal waits until they explain why in the chat you already have.
The pattern is visible in national figures. according to UK Finance, two thirds of authorized push payment cases start on the internet, and another 17 per cent start with a phone call. The channel is where the case is built, long before anybody mentions an account number.
Steps five and six are the terms. Agree the price, the condition, who pays for delivery and what happens if the item fails to match the description, in messages that stay on the platform. Then ask for one fresh photograph of the item beside a sheet of paper with today's date on it. That request ends a large share of these conversations.
The payment method decides whether a refund stays possible
Choose the method by answering one question in advance: if the item never arrives, who can be asked for the money. A card payment and the platform's own protected payment leave a third party who holds a record and can act on a dispute. Cash and a transfer to a personal account leave a conversation and nothing else.
A transfer you authorize yourself is the hardest case. The money leaves with your own confirmation, and the bank sees a legitimate instruction. Recovery then depends on how quickly the receiving account is frozen and on the bank's own process. So the method is settled while there is still a choice to make.
From that follows the plainest line on the sheet. Any request to change the agreed method at the last minute, for a discount, for a quicker handover or because the terminal is broken, ends the deal for that day. The reason is simple: a safe marketplace deal survives a postponement, and a prepared scheme rarely does.
The meeting: a short order of actions on the spot
Step seven is the place and the hour. Daylight, a public spot with cameras, a bank lobby or a shopping center, and somebody at home who knows when you expect to be back. A flat, an unlit car park and a courier who wants to meet at the entrance are declined without discussion.
Step eight is the item in your hands. Power it on, check the serial number against the box and against the advert, confirm it is not locked to another account and test the function you are buying it for. For anything that comes with documents, read the papers before you start the engine.
Step nine is the money and the receipt. Pay after the check, count in front of the other person, and write a short receipt with both names, the date, the identifiers of the item and the sum, in two signed copies. A receipt costs a minute, and it is the part of a safe marketplace deal that survives after both sides have gone home.
The seller runs the same steps in reverse
For the seller the order holds and the risks change shape. A screenshot of a completed transfer is produced in a graphics editor faster than a buyer can walk to the door. Then comes the buyer who pays, collects the item and later disputes the payment. Then the overpayment story, where somebody sends more than the price and asks for the difference back.
So the seller's rule is short. Confirm the money in your own banking application, on the balance, and hand the item over when the funds are there and cleared. A message, a screenshot and a call from somebody who says they are with the bank are all things another person can produce to order.
The same discipline covers personal data. A buyer has no use for photographs of your documents, your full card number or a code from an incoming text message. Hand over the item, the receipt and nothing further, whatever explanation arrives with the request.
When the two sides never meet: delivery and remote payment
A remote deal keeps the principle and changes the order. Use the platform's own delivery with protected payment, where the sum is held until the parcel is collected and inspected. The fee for that service buys the dispute route, and it is small beside the sum at risk. Protected delivery is what a safe marketplace deal looks like when the two sides never meet.
Step ten for the buyer is the unpacking. Film it in one continuous take, beginning with the untouched label and the intact tape. The recording is the only thing that separates an empty box from a delivered item, and it cannot be made afterwards.
Payment links sent in chat deserve their own line. Open the platform or the bank from your own bookmark or application, complete the payment there, and ignore the link, however ordinary it looks. The address bar is the only part of a copied page the other side does not control.
After the handover: what to keep and what to do if it goes wrong
Keep the whole file for as long as the item matters: an export of the chat, the receipt, the delivery documents and the payment confirmation from the bank. One folder with the date in its name is enough. Every institution you contact later asks for the same set.
If the money has gone where it should not have gone, the order is fixed. Telephone the bank within the hour and ask for the payment to be recalled and the receiving account flagged. Report the account inside the platform, so it is suspended before the next person answers the same advert. Then file with the national fraud reporting service.
The last line belongs on the sheet as well. Write down the date, the sum, the account you sent to and the name the other side used, before the chat disappears from the other end. Reporting matters because a safe marketplace deal is a private matter until it fails, and the report is what helps the next reader.
What each payment method leaves behind, and what is left to claim
| Payment method | What it leaves behind | Route back to the money |
|---|---|---|
| Protected payment inside the platform | An order record and funds held until receipt | A dispute opened before the sum is released |
| Card payment to a registered trader | A card statement and an issuer between the two sides | A dispute raised with the card issuer |
| Bank transfer to a personal account | One line in the statement with a name and a number | A claim to your bank, decided case by case |
| Cash at the meeting | Only the receipt the two of you write and sign | The receipt, and a report to the police |
| Cryptocurrency transfer | A confirmed transaction on a public ledger | None once the transfer has confirmed |
| Gift card or voucher codes | Codes that the other side redeems at once | None after the code has been read out |
| A payment link received in chat | A page controlled by whoever sent the link | Whatever the card behind it allows, if anything |
Questions and answers
- How do I make a safe marketplace deal with a stranger?
- Settle the place and the payment method before anything else is discussed, keep the whole agreement inside the platform chat, and check the item in your hands before the money moves. Every other step on the sheet supports those three.
- Which payment method lets me get my money back?
- A card payment or the platform's own protected payment leaves a third party who holds a record and can act on a dispute. Cash, cryptocurrency and a transfer you authorize to a personal account leave nobody who can reverse the payment once it has completed.
- Is it safe to send a deposit before seeing the item?
- A deposit sent before you have seen anything removes your only leverage and gives the other side a reason to stop replying. Where a deposit cannot be avoided, send it through the platform's protected payment, so that release depends on delivery.
- How can a seller tell a real payment from a fake screenshot?
- Open your own banking application and look at the balance, because a screenshot, a confirmation e-mail and a telephone call can all be produced by the other side. Hand the item over when the funds are visible and cleared in the account.
- What should I do if I have already transferred the money?
- Telephone the bank within the hour, ask for a recall and for the receiving account to be flagged, then report the account inside the platform so it is suspended. File with the national fraud reporting service afterwards, since later institutions ask for that case number.
- Does meeting in person remove the risk?
- A meeting removes the delivery risk and leaves the item and the money in one room, which is why the place, the check and the receipt each keep a step of their own. A public spot with cameras, a serial number checked against the box and a signed receipt cover most of what remains.
Written by Zavialov Ilia Nikolaevich, digital security consultant. All checklists