Marketplace and resale platforms let you sell things you no longer need and find bargains, sometimes from someone down the street. They also put you in contact with strangers who you cannot easily check. Most transactions go smoothly. The ones that do not tend to follow a few repeating patterns, which makes them easier to avoid once you know them.
Start on the platform and stay there
Scammers like to move conversations to text messages, email or other chat apps. Once you leave the platform, you may lose its message history, its reporting tools and any protection it offers.
- Keep your conversation in the platform’s own messaging for as long as possible.
- Use the platform’s checkout or payment system if it has one. Some offer limited buyer or seller protection, but only when the whole deal, including payment and shipping, follows their rules. Read what is covered.
- Be cautious if a buyer or seller insists on going elsewhere, particularly to a payment method that cannot be reversed.
Understand the common scams
You do not need to memorize every variation. Most share a pushy tone, an unusual payment method or a story that changes the rules.
For sellers
- Overpayment. A buyer “accidentally” sends too much and asks you to refund the difference, or to pay a shipper. The original payment later fails or is reversed, and your refund is gone.
- Fake payment proof. A screenshot or email that says payment was sent is not payment. Check your own account, and confirm the funds are in your account and cleared.
- Code requests. A buyer asks you to share a verification code sent to your phone, saying it is needed to “confirm” you are real. This can hand over your account, and is related to text message scams generally.
- Fake courier or escrow. A buyer proposes a particular “secure” service whose website you have never heard of. The site may be a copy designed to hold money or collect your details. Treat it as one of the package delivery scams in disguise.
- Chargebacks and false claims. A buyer receives the item and then claims it did not arrive. Keeping proof of postage, photos of what you sent and records of the conversation helps.
For buyers
- Too-good prices. Items listed far below normal prices, especially popular electronics, tickets, vehicles or rentals.
- Items that do not exist. The seller asks for a deposit or full payment first, then vanishes.
- Stolen photos. Pictures lifted from other listings or from a manufacturer. You can do an image search to see if they appear elsewhere.
- Pressure. “Others are interested, pay now.”
- Switch to a hard-to-reverse payment such as a bank transfer, gift card, cryptocurrency or a payment app to a stranger. These payments are what the payment app mistakes guide warns about.
Check who you are dealing with
No profile is proof, but some details help.
- How long has the account existed, and does it have a history of other sales or reviews?
- Do the profile and listings look consistent, or does the seller sell wildly unrelated things in different cities?
- Do the messages match the listing? Vague replies that ignore your questions are a flag.
- Remember that fake social profiles and hijacked accounts exist. A real, well-reviewed account may have been taken over, so keep your guard up if the behavior changes.
Protect your personal information
- Keep your home address, full birth date, ID numbers and financial details out of listings and chats.
- Use the platform’s messages rather than your personal phone number or email. An email address alias or a dedicated shopping address can help if you do need to give an address.
- Be careful what your photos reveal. A picture taken inside your home may show your address on a letter, your car’s plate or your surroundings. Photo location data may also be embedded in pictures, so consider removing it or checking what your phone shares.
- Ignore requests for details unrelated to the sale, such as your bank login, a copy of your ID or a “verification” step you cannot confirm.
Meeting in person
Many local sales happen face to face. A few general habits reduce risk.
- Choose a public, busy place with good lighting, ideally with cameras around. Some communities set up designated safe-exchange spots, such as the car park of a police station, where available.
- Bring a friend or tell someone where you are going and when you expect to return. Keep your phone charged.
- Avoid inviting strangers into your home. For large items, consider having another person present, or a meeting point at the door or driveway.
- Take your own transport, and do not agree to go somewhere remote.
- Inspect the item before paying. If it is not as described, you can decline.
- If you feel uneasy about a person or place, leave. A sale is never worth ignoring your instincts.
- Think about cash. It is simple, but carry only what you need, and check bank notes if you are concerned about counterfeits. Some people prefer a payment method that appears in their account immediately and is confirmed on their own device, not on the other person’s screen.
When something goes wrong
- Stop communicating and do not send more money.
- Report the listing or user to the platform.
- Contact your bank or payment provider immediately if you paid or shared financial details.
- Keep screenshots and records.
- If you were threatened or feel unsafe, contact local emergency services, and report fraud to the police or your country’s fraud-reporting body.
Safe trading mostly means slowing down, staying on the platform and refusing payment methods you cannot undo. If a deal feels wrong, walking away is nearly always the right call.