Example scenario · illustrative, not a real seller
An example buyer messages: “Sent $150 by mistake for your $120 bike, send $30 back?” with a screenshot. Your own app shows nothing received. Nothing is sent, and the buyer is reported.
What you’ll get
- The common payment scam patterns.
- A check for each one.
- How to confirm payment yourself.
- Why you never share a verification code.
- When to stop and report.
A payment screenshot is not a payment
Most Facebook Marketplace payment scams aimed at sellers have the same shape: the buyer creates the appearance of money, then asks you to act on it, by handing over the item, refunding an "overpayment" or reading out a code. Meta's Marketplace safety page names the first trick directly: buyers may request refunds without actually paying, so always check your account to confirm payment, even if they send you a screenshot showing the transaction.
The habit that defeats these scams is simple. You only trust money you can see in your own account, opened by you.
The patterns to recognize
Meta's safety page, checked November 8, 2026, and an FBI field office warning describe these patterns:
| Pattern | What happens | What to do |
|---|---|---|
| Fake payment or screenshot | Buyer shows "proof" that never reached you | Open your own payment app or bank yourself and check |
| Overpayment and refund | Buyer "accidentally" pays too much and asks for the difference back | Check your account; contact your payment app's support directly if unsure |
| Off-platform contact | Buyer pushes early to move to phone or email | Keep the conversation in Marketplace messages |
| Phishing links | A link asks you to log in or enter card or bank details | Never share them; treat the link as a red flag |
| Verification code request | Buyer asks you to read out a code sent to your phone | Never share the code |
Meta's page says off-platform scams are most common in the vehicle, rental and home goods categories. It describes links that require you to log in with personal information or passwords as an immediate red flag.
Step 1: Agree the payment method in messages
Decide before the meeting how you'll be paid, and write it in Marketplace messages: cash on collection, or a named payment app with the exact amount. A clear agreement gives you a reason to refuse last-minute changes such as "my bank will send a confirmation email."
Step 2: Check your own account, not theirs
Open your payment app or banking app yourself, from your own phone, and look for the payment as received and available. Don't use a link the buyer sends, don't trust an email that claims to be a confirmation, and don't accept a screenshot on the buyer's phone. If anything is unclear, contact your payment app's support directly, as Meta's page advises.
Refund check: If a buyer says they paid too much and asks you to send the difference back, stop. Meta lists overpayment among the common scams. Confirm the original payment in your account first; any genuine overpayment can be refunded through the same payment app it came from.
Step 3: Never share a verification code
The FBI's Portland field office warned on January 4, 2022 about a Google Voice authentication scam that can reach people dealing with strangers online, including buyers and sellers: the scammer says they'll send an authentication code to confirm you're a real person, then uses your real phone number to set up a Google Voice account in your name, and can also use the code to take over your Gmail account. The FBI's advice includes never sharing a Google verification code with others, dealing with buyers and sellers in person, and making sure you're using legitimate payment processors if money changes hands. A buyer has no legitimate reason to need a code sent to your phone.
Step 4: For cash, count it at the handover
For cash sales, count the money before handing over the item, in a public, well-lit place. Agree the exact total in messages beforehand, including any delivery fee, so the count is quick. The meeting buyers manual covers where and how to meet.
Step 5: Stop and report if it feels wrong
Meta's page says that if you think something is a scam, you should stop communicating with the buyer and report them, and that you can report behaviors such as solicitation of personal information and offering overpayment. You don't owe a suspicious buyer an explanation. Leave the item listed for genuine buyers.
Worked example: a buyer who "already paid"
In this chosen example, a buyer messages about a $120 bike: "Sent $150 by mistake, can you send $30 back before I collect?" with a screenshot attached. Following the steps: you open your own payment app and see no incoming payment. You don't send anything, stop replying and report the buyer. The bike stays listed. If the payment had appeared in your account, any overpayment would be returned through that same app, not by a separate transfer.
Common mistakes
- Accepting a screenshot or email as proof.
- Sending a "refund" before confirming the original payment.
- Reading out a verification code to prove you're real.
- Moving the chat to text or email because the buyer insisted.
- Clicking a link to "receive" a payment.
The buyer scams manual covers scams on other platforms.
Trust your own account
Only money you can see in your own account, opened by you, counts as paid. Keep the chat on Marketplace, never share codes and report anyone who pushes you to act on a payment you can't see.
Worked example · hypothetical, not a real seller
Keep the example in view
| Pattern | Check |
|---|---|
| Screenshot as proof | Open your own app yourself |
| Overpayment refund request | Confirm the original payment first |
| Push to text or email | Keep messages on Marketplace |
| Payment link to log in | Treat it as a red flag |
| Verification code request | Never share it |
Before the next transaction
With JavaScript and browser storage, only checked-step IDs can stay on this device. No buyer details or amounts are saved.
Practical questions
Is a payment screenshot proof?
No. Meta advises always checking your own account to confirm payment, even if a buyer sends a screenshot.
What is the overpayment scam?
A buyer claims to have paid too much and asks for the difference back. Meta lists it among common scams.
Why would a buyer ask for a code sent to my phone?
The FBI has warned that scammers use such codes to set up a Google Voice account with your number. Never share them.
What should I do if I suspect a scam?
Meta says to stop communicating and report the buyer.
Do this next · one concrete move