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How to Verify an Online Seller or Buyer Before You Pay (2026 Guide)

Updated: May 2026 · 173+ platforms searched

How to Verify an Online Seller or Buyer Before You Pay (2026 Guide) — illustrated guide on Lullar
Before sending money or shipping an item, verify who you are dealing with. 7 checks that expose marketplace scams in minutes.
Quick Steps
1 Why Marketplace Scams Spike in 2026 2 The 7-Step Verification Workflow 3 Red Flags You Should Never Ignore 4 Verifying Buyers (When You Are the Seller) 5 When a Deal Is Worth a Deeper Check
Quick Navigation:
  1. Why Marketplace Scams Spike in 2026
  2. The 7-Step Verification Workflow
  3. Red Flags You Should Never Ignore
  4. Verifying Buyers (When You Are the Seller)
  5. When a Deal Is Worth a Deeper Check
Verify a Seller or Buyer

Why Marketplace Scams Spike in 2026

Facebook Marketplace, Craigslist, OfferUp, Mercari, Depop, eBay, Vinted, Carousell — every peer-to-peer platform has the same problem: anyone can list anything, and platform protections only kick in after money has changed hands. Sophisticated scammers use new accounts, AI-generated photos, and pressure tactics to close deals before buyers can think.

The 5-minute verification below catches the vast majority of scams before they cost you anything.

The 7-Step Verification Workflow

  1. Check account age. Most marketplaces show "joined Month Year" on profiles. New accounts (under 60 days) handling expensive items are higher risk.
  2. Reverse-image the listing photos. Stolen photos from other listings are the #1 scam tell. Paste the photo into Google Images or TinEye.
  3. Search the seller's username and name. Lullar checks 170+ platforms — real people leave a trail elsewhere. Brand-new identity? Be cautious.
  4. Check the phone number. Paste it in Google with quotes — scam numbers often appear in warning forums.
  5. Verify the location. Ask for a specific neighborhood or zip code. Vague locations like "the area" are red flags.
  6. Insist on platform-internal payment. Never move to Cash App, Zelle, gift cards, or wire transfer. Those have zero recourse.
  7. If meeting in person: public place, daytime, bring a friend, never go to a private residence first.
Considering a High-Value Transaction?

Spokeo can confirm the person behind a marketplace listing is who they claim to be — name, age range, public-record context, and known associates.

Search on Spokeo →

Red Flags You Should Never Ignore

Any one of these is enough to walk away. Two or more together = certain scam.

Don't just read — try a search now

Verifying Buyers (When You Are the Seller)

Sellers get scammed too. Common buyer scams:

Protections: only accept platform-verified payment methods, ship to the verified address on file, get tracking + signature confirmation on anything valuable, and check the buyer's account history before agreeing to anything unusual.

When a Deal Is Worth a Deeper Check

For high-value items — vehicles, electronics over a few hundred dollars, rentals, real-estate transactions — the 7-step check is your first filter, but a public-records lookup adds another layer. Confirming that the seller's claimed name and city match real public records is a strong signal.

Use these tools for your own personal-use verification only. They are not for employment, tenant, credit, or insurance decisions — those legally require an FCRA-compliant agency.

Frequently Asked Questions

What is the single biggest marketplace scam to watch for?

Off-platform payment requests. The moment a seller or buyer tries to move you to Cash App, Zelle, gift cards, or wire transfer, the platform's buyer/seller protection vanishes. Refuse politely and stay in the platform's payment flow — or walk away.

How do I check if a listing photo is stolen?

Right-click the photo, copy the image URL, paste it into Google Images or TinEye. If the same photo appears on dozens of unrelated listings or stock-photo sites, it is stolen and the listing is almost certainly a scam.

Is it okay to ask for a video call before paying?

Absolutely. Legitimate sellers expect this for higher-value items. A 60-second video showing the item in their hands with today's date written on a piece of paper next to it is the gold-standard proof of possession.

Is verifying someone before a marketplace transaction legal?

Yes. Searching public information about someone you are about to do business with is legal in nearly every jurisdiction. Just do not use the data for FCRA-regulated decisions (employment, tenant, credit, insurance) — those require a licensed consumer reporting agency.

Avoid the Marketplace Scam
Deep Search on Spokeo →
Want to know who they really are?

TruthFinder® can provide a detailed report from public records to help verify identity before you meet — results in minutes.

View TruthFinder® Report →

For personal use only — TruthFinder® is not a Consumer Reporting Agency and reports cannot be used for employment, tenant, credit, or insurance decisions.

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