Selling a Car Online? Verify the Buyer's Phone Number First

When you sell a car online, verify buyer phone number details before you share anything else or agree to a payment method. Call them (an actual voice call, not just texts), confirm the name they gave you matches the name tied to the number, and be wary of internet-only VoIP numbers paired with an out-of-town story. Most scams aimed at private car sellers start with a text from a number that falls apart under a little checking.

The money involved is real. In March 2026 testimony to Congress, the FTC said consumers reported losing $15.9 billion to fraud in 2025. Car sellers are a known target: in February 2025 the FTC put out a consumer alert about a fake check scam aimed specifically at people selling cars online, and its advice boils down to the same few rules you’ll find below.

The scams that start with a text

The details change. The scripts mostly don’t.

The overpayment check

The buyer is out of town, or deployed, or buying it for a relative. They’ll send a cashier’s check, and it arrives for more than your asking price “by mistake” or “to cover the shipper.” They ask you to send back the difference. The check looks perfect. It might even show up in your account the next day. Weeks later the bank discovers it’s counterfeit and takes the money back, and the amount you sent is gone. The CFPB explains this pattern plainly: if you deposit a fake check, you can be required to repay the funds even after you’ve withdrawn them.

The verification code

“There are so many fake listings. Can you prove you’re real? I’m sending you a code, just read it back to me.” That code is usually a Google Voice setup code. Reading it out lets the scammer attach a new VoIP number to your phone number, which they then use to scam other people under your identity. Nobody legitimate needs your verification code. Ever.

The vehicle history report site

The buyer insists you buy a vehicle history report from one specific website they link to. The site takes your card number and the “report” is worthless or never arrives. Legitimate buyers either run their own report or are happy with one you already have from a known provider.

The shipper or agent

“My mover will pick it up and pay you.” The plan always involves you sending money somewhere (for a fee, a refund or insurance) before you’ve been paid in a form you can trust.

What these have in common: a buyer who never wants to talk live, never wants to see the car, and always has a reason the money needs to move in an unusual direction.

How to verify buyer phone number details for free

You can do most of the checking yourself in five minutes.

Call, don’t just text. Ask a couple of real questions about the car. Scam operations often work from scripts and avoid live calls, or the voice doesn’t match the story (“I’m a retired schoolteacher in Ohio” from a noisy call center). Someone who won’t take a two-minute call about a several-thousand-dollar purchase is telling you something.

Ask for their full name, then compare. If your carrier displays caller ID names, the name that pops up comes from phone company records, not from whatever the person typed into the marketplace app. If “Mike Torres” calls you and the caller ID says something entirely different, ask about it. There are innocent explanations, like a spouse’s line or a work phone. Our explainer on caller ID name lookups covers where that name comes from.

Search the number. Paste it into a search engine with quotes. Numbers used in scams often show up in complaint threads. A blank result proves nothing, but a page of complaints proves a lot.

Check the line type. A mobile number from a major carrier is tied to a real account. A VoIP number from an online app can be created in minutes. VoIP isn’t a scam by itself (plenty of people use it for work), but VoIP plus an out-of-state story plus a check for more than the price is the classic combination. We explain the categories in mobile vs. landline vs. VoIP and what to look for in burner phone numbers.

Be careful with free “reverse lookup” sites. Many show stale or bundled data and push you toward a paid report. Our comparison of free vs. paid reverse phone lookups explains what you actually get.

What the phone details usually look like

Here’s a side-by-side of two fictional buyers who both texted about the same 2017 sedan listed at $11,500:

You don’t need software to read that table. Buyer B is not buying your car. (If you’re curious what goes into that last signal, here’s how a phone number fraud score is built.)

When a credit check makes sense, and when it doesn’t

A buyer paying in full doesn’t need a credit check. Their bank does the verifying for you when it issues a cashier’s check or sends a wire you can confirm. Pulling someone’s credit without a reason the law recognizes isn’t allowed, either. The FCRA’s permissible purpose rules apply to private sellers as much as anyone.

It’s different when the buyer asks to pay over time. If you agree to $4,000 down and $500 a month, you’re extending credit, and checking their credit with their written OK is exactly what that permission is for. Our lookup takes just their phone number and, with that OK, returns their name and current address from their TransUnion credit file, their real FICO® Score 4 and a credit profile summary, plus phone details: line type, carrier, caller ID name and a fraud score for the number. It’s a soft pull, so it doesn’t affect their score and they aren’t notified.

If the buyer won’t agree in writing to a soft credit check for a payment plan, that’s your answer about the payment plan. For more on where the legal lines are, see is it legal to look up someone’s credit.

Getting paid without getting burned

A phone check weeds out a lot of fake buyers. How you take the money handles the rest.

Meet at the buyer’s bank. Watch the teller issue the cashier’s check or start the transfer, and sign the title there. For a private sale, nothing else comes close.

Know why “available” doesn’t mean “good.” Federal rules generally require banks to make cashier’s check deposits available quickly, often by the next business day, under Regulation CC. That’s the gap scammers exploit: the money shows up long before anyone has confirmed the check is real. And as the OCC’s consumer help site explains, if your bank credited a check that later turns out to be fraudulent, it can generally reverse those funds, which puts the hole back in your account.

Verify a check with the issuing bank, using a number you looked up yourself. Not the number printed on the check, which may ring straight to the scammer.

Never refund an overpayment. There’s no honest version of “I sent too much, please send the rest back.” Decline the check.

Use a payment app only with people you know, and watch for fake “payment pending” emails that ask you to do something before the money releases. Real apps don’t work that way.

Use escrow only if you chose it. Scammers set up convincing fake escrow sites. If the buyer insists on a particular escrow service, look it up independently and be suspicious.

Test drives and handover

A real buyer will want to see and drive the car, which brings its own small risks. Meet in a busy public place; many police departments have marked exchange zones in their parking lots for exactly this. Take a photo of the buyer’s driver’s license before the test drive and ride along. Don’t hand over keys and title until the money is in a form you’ve verified.

Then finish the paperwork properly: sign the title the way your state requires, write a bill of sale with the date, time, price and odometer reading, and file a release of liability or notice of sale with your state’s motor vehicle agency so tickets and tolls after the sale aren’t yours.

A quick pre-sale checklist

1. Buyer will take a live phone call.
2. Caller ID name roughly matches the name they gave, or there’s a believable reason it doesn’t.
3. The number isn’t a disposable VoIP line paired with a long-distance story.
4. No request for verification codes, specific report sites, or shippers you pay.
5. Payment happens at their bank, or by a method you can confirm with the issuer yourself.
6. Nothing over the asking price.

If any line fails, slow down. The right buyer for your car won’t mind waiting a day while you check. Renting out a property instead? The same instincts apply, and our guide to verifying phone numbers in rental scams covers that side.