Buying a Car From a Private Seller in California: Paperwork

When you buy a car from a private seller in California, you walk away with three essential documents: the California Certificate of Title signed by the seller, a valid smog certificate (for most cars), and a bill of sale. Then you have 10 days to report the transfer to the DMV and pay use tax. Get those right and the sale is straightforward. Get one wrong and you can end up with a car you can't register.

Private sales also have fewer safety nets than dealer purchases. There's no three-day return right and no lemon law coverage, so the verification work is on you. This guide covers the documents, the order of operations on sale day, safe payment, and the pitfalls that catch buyers in Irvine and across Orange County.

The documents you need from the seller

California Certificate of Title (pink slip)

This is the most important document. Check that:

• The seller's name on the title matches their photo ID.
• The VIN on the title matches the VIN on the dashboard and door jamb.
• There's no brand you weren't told about, such as salvage or lemon law buyback.
• If a legal owner (lender) is listed, there's a plan to release the lien, either a lienholder signature on the title or a REG 166 Lien Satisfied.

The seller signs the release section; you sign as the new owner. For exactly where each signature goes, see California title transfer step by step.

If the seller has lost the title, they can use REG 227 to apply for a replacement or transfer. When there's a lienholder, section 5 of REG 227 must be notarized. Don't pay in full until you know the title situation is resolved.

Smog certificate

Under Vehicle Code 24007, the seller must provide a valid smog certificate. It's good for 90 days from the inspection. Exceptions include EVs, cars four or fewer model years old (you pay a smog transfer fee instead), and certain family transfers. A seller who says "it'll pass, just smog it yourself" is shifting a legal duty and a financial risk onto you.

Bill of sale

A REG 135 Bill of Sale or equivalent records the date, price, VIN, and both parties' names and signatures. It's your proof of the purchase price for use tax. See our REG 135 guide.

Odometer disclosure

Many titles include an odometer section; otherwise REG 262 is used. Make sure the reading matches the car.

Sale day, step by step

1. Meet in a safe, public place during daylight. Some police departments offer designated safe exchange spots; ask your local department whether one exists near you.
2. Verify the seller's ID against the title.
3. Inspect and test drive the car if you haven't already. Ideally, you've had an independent pre-purchase inspection done beforehand.
4. Review the smog certificate and confirm the date and VIN.
5. Fill out the bill of sale together.
6. Pay using a traceable method (see below).
7. Receive the signed title, smog certificate, keys, and any service records.
8. Take photos of every signed document.
9. Make sure the car is insured in your name before you drive away.

How to pay safely

Avoid carrying large amounts of cash. Safer options include:

• Cashier's check from your bank, ideally completed at the seller's bank so they can verify it.
• Meeting at your bank and transferring funds there.
• Lender payment if you're using a private-party auto loan; the lender typically pays the seller directly.

Be wary of anyone asking for gift cards, wire transfers before you've seen the car, or payment through an escrow service you've never heard of. Those are classic scam signs. Our article on buying on Facebook Marketplace safely covers online red flags in detail.

After the sale: DMV deadlines

• You must report the change of ownership to the DMV within 10 days and pay use tax at your address's rate. In Irvine, that's 7.75%; in Santa Ana, 9.25% (rates effective Oct 1, 2026; check CDTFA's rate lookup).
• The seller should file a Notice of Transfer and Release of Liability within 5 days.
• Fees: the transfer fee is commonly cited as $15, plus registration and other fees. Use the DMV Fee Calculator at dmv.ca.gov.

Your new title usually arrives by mail in 15 to 30 days.

Common pitfalls

• Unlicensed dealers posing as private sellers. If the name on the title isn't the person selling, or they have several cars for sale, ask questions. Buying a car that was never titled to the seller can create problems at the DMV.
• Undisclosed liens. A car with an active loan can't be transferred cleanly until the lender releases its interest.
• Title brands. Salvage and revived salvage titles affect value and insurance. Get an insurance quote first.
• Out-of-state titles. Cars from other states need a VIN verification (REG 31) and a California smog check at first registration.
• Skipping the inspection. Private sales are generally final. An inspection is your best protection; see our vehicle history and inspection guide.

Frequently asked questions

Can I buy a car from a private seller without a title?

It's risky. The seller should provide the title or complete a REG 227 to replace or transfer it. Without a properly completed title or replacement application, you may not be able to register the car.

Do I need to go to the DMV with the seller?

No. The seller signs the title and other documents at the sale, then files the release of liability separately. You submit your transfer within 10 days.

What if the smog certificate is expired?

A smog certificate is valid for 90 days. If it's expired, the seller should get a new one. It's the seller's legal responsibility, even in an "as is" sale.

Is a handwritten bill of sale OK in California?

A handwritten bill of sale can work if it includes the necessary information, but the DMV's REG 135 form is a clean, standard option. Make sure it includes the price, date, VIN, and both parties' signatures.

Can a family member sell me a car without use tax?

Transfers between certain family members, such as parents and children or spouses, may be exempt from use tax with a REG 256. Check DMV rules before assuming you qualify.

Prefer a simpler process?

If you'd rather skip some of the legwork, cars from Irvine Used Cars are smog checked before sale, and we provide the signed title, smog certificate, and bill of sale. Browse our inventory, read the step-by-step Orange County buying guide, or call or text (516) 835-6141 to book a test drive in Irvine.