7 Marketplace Scams to Avoid in 2026 (Facebook, Craigslist, OfferUp)
Protect yourself from the most common online marketplace scams in 2026. Learn how Zelle fraud, Google Voice scams, fake listings, and more work — and how to verify buyers and sellers with proof.show.
Know the Scams, Stay Protected
Each of these scams targets everyday buyers and sellers. Learn how they work and how proof.show helps you stay safe.
Zelle Facebook Marketplace Scam
Scammers pose as buyers on Facebook Marketplace and trick sellers into sending money through fake Zelle "business account" upgrade emails.
Read MoreGoogle Voice Verification Scam
A fake buyer asks for your phone number to "verify you're real," then uses the Google Voice verification code to hijack your number for future scams.
Read MoreNeighbor in Distress Scam (Nextdoor)
Fraudsters exploit community trust on Nextdoor by posing as distressed neighbors to solicit money, gift cards, or personal information.
Read MoreFake High-Value Item Listings
Too-good-to-be-true deals on PS5s, cars, and electronics lure buyers into paying deposits for items that don't exist.
Read MoreEmpty Box Refund Fraud
Dishonest buyers claim they received an empty box or a different item, filing chargebacks that leave honest sellers with no product and no payment.
Read MoreFake Marketplace Support Messages
Phishing messages disguised as official support from Poshmark, Depop, or Facebook trick users into handing over login credentials and payment details.
Read MoreRemote Landlord Rental Scam
Scammers copy real rental listings and pose as out-of-town landlords, collecting deposits and first month's rent for properties they don't own.
Read MoreCan I Sue My Employer? Real Stories + What Evidence Wins
Workers share real experiences of wrongful termination, unsafe conditions, wage theft, and retaliation. Learn exactly when you have a case and how to build documentation that holds up in court.
Read GuideGlobal Property Scams: How Real Estate Fraud Works in 2026
Phantom rentals in NYC, absentee-heir title fraud in Guyana, double-sold land in Lagos, pre-construction phantoms in Mexico — 8 high-risk markets, how each scam operates, and how to verify before you wire.
Read GuideFrequently Asked Questions
The most common marketplace scams include Zelle/Venmo payment fraud, Google Voice verification hijacking, fake high-value listings, empty box refund fraud, fake platform support phishing, remote landlord rental scams, and neighbor-in-distress scams on community platforms like Nextdoor.
No. Sharing your phone number with an unverified buyer exposes you to Google Voice verification scams, SIM-swapping, and targeted phishing. Use in-app messaging whenever possible, and ask buyers to verify their identity through proof.show before exchanging personal information.
Ask the other party to take a live, verified photo through proof.show. The SHA-256 hash and atomic timestamp prove the photo was captured in real-time by a real person — not generated by AI or pulled from the internet. You can verify any Proof Code instantly at proof.show/v.
Unfortunately, peer-to-peer payments through Zelle and Venmo are typically irreversible once sent. Banks consider these "authorized" transactions even if you were tricked. Prevention is the only reliable protection — verify the identity of every buyer or seller before transferring funds.
Advances in AI allow scammers to generate convincing fake photos, create realistic-looking profiles, and automate phishing at scale. Combined with the irreversibility of peer-to-peer payments and limited platform enforcement, scammers face almost zero consequences. Identity verification tools like proof.show are essential to closing this trust gap.
Protect Yourself Before Your Next Online Sale
Don't become the next victim. Verify buyers and sellers instantly with proof.show — cryptographic proof that the person you're dealing with is real.