How to Avoid Marketplace Scams
By Elena Rostova (Trust & Community Safety Lead) | Published: October 6, 2026 (Updated October 7, 2026) | 8 min read
Quick Overview
To avoid marketplace scams, watch out for red flags such as buyers offering to pay more than your asking price, requests for advance shipping deposits, off-platform SMS links, and phishing attempts asking for 6-digit verification codes. Always verify buyer profiles, conduct deals through in-app chat, and inspect goods and payments in person in well-lit public meeting locations.
1. The Overpayment / Fake Check Scam
In this scheme, a buyer claims to want your item immediately and sends a cashier's check or mobile deposit for more than the asking price (e.g. sending $800 for a $500 item). They instruct you to wire the remaining $300 to their 'courier' or 'moving agent'. Days later, the bank discovers the check is fraudulent and reverses the full deposit, leaving you out of pocket for the wired funds and the item. Never accept checks or wire back overpayments.
2. The Verification Code / SMS Phishing Scam
A buyer messages you claiming: 'I want to verify you are a real person before we meet. I am sending a Google or phone code to your phone; send me the 6-digit PIN.' In reality, the scammer is trying to hijack your phone number or register a fraudulent Google Voice account using your mobile identity. Never share a verification code or one-time password (OTP) with anyone.
3. The Fake Courier & Phishing Link Scam
A buyer claims they cannot meet in person and promises to arrange delivery via a courier service (FedEx, UPS, or a regional courier). They send you an external web link claiming you must enter your credit card details to receive payment. This is a phishing website designed to steal payment card credentials. DealDone transactions never require entering credit card details on third-party links to receive payment.
4. Counterfeit Electronics and Luxury Goods
Counterfeit smartphones and luxury designer goods are manufactured with high cosmetic fidelity. Protect yourself by testing the device thoroughly: check IMEI numbers on carrier databases, verify serial numbers on manufacturer lookup pages, and inspect software responsiveness before paying.
5. Top Red Flags Summary Table
| Scam Technique | Warning Sign | Recommended Action |
|---|---|---|
| Overpayment Scam | Buyer sends extra money and asks for refund difference | Decline immediately; cancel deal |
| SMS Verification Scam | Buyer asks you to read back a 6-digit code | Never share OTP codes; block user |
| Fake Courier Link | Link sent in chat asking for credit card info | Do not open link; report to DealDone |
| Off-Platform Trap | Buyer refuses in-app chat and demands WhatsApp/email | Stay inside DealDone in-app messaging |
Frequently Asked Questions
What should I do if I suspect a scammer on DealDone?
Tap the 'Report' button on the user's profile or conversation immediately. Do not send further messages or provide personal details. Our safety team investigates and bans offending accounts.
Can a scammer reverse an in-person cash payment?
No. Physical cash in hand cannot be reversed, making cash exchanges in daylight public places the safest method for completing local second-hand sales.
Related Safety Guides
Read Marketplace Safety Tips, check Safe Buying Guide, contact Help & Support, or read our Privacy Policy.