
When selling your car in New Jersey, you must sign the title in the assignment of ownership section on the back. This is the most critical step to legally transfer the vehicle. The seller's signature must be notarized for the transaction to be valid. You'll find the specific area labeled "Assignment of Title by Registered Owner" where you, as the seller, print your name, write the sale price and odometer reading, and sign exactly as your name appears on the front of the title. The buyer then completes their section.
Before you meet the buyer, fill out your portions to avoid errors. You need to provide the title, the vehicle's registration, and a notarized Bill of Sale. The Bill of Sale serves as a receipt and protects both parties. After the sale, you must report it to the New Jersey Motor Vehicle Commission (MVC) to release your liability. This can be done online or by submitting the "Certificate of Sale" section of the registration.
The table below outlines the key documents and requirements for a private car sale in New Jersey.
| Document/Requirement | Description | Key Details |
|---|---|---|
| Certificate of Title | The primary document proving ownership. | Sign and print name in the "Assignment of Title by Registered Owner" section on the back. |
| Notarization | Mandatory for the seller's signature on the title. | A notary public must witness your signature. The buyer's signature does not need to be notarized. |
| Bill of Sale | A receipt documenting the transaction details. | Should include vehicle info (VIN, make, model), sale price, date, and signatures of both parties. Recommended to be notarized. |
| Odometer Disclosure | Federal requirement stating the mileage at the time of sale. | This is included within the assignment section on the back of the New Jersey title. |
| Seller's Liability Release | Crucial step to avoid future tickets or fines for the car. | Submit the "Certificate of Sale" from the registration or notify the MVC online via their vehicle sales portal. |
After the sale, keep your copy of the Bill of Sale and the confirmation of your liability release. The buyer is responsible for titling, registering, and insuring the vehicle in their name.

Back of the title, bottom section. Look for "Assignment of Title by Registered Owner." Print your name, fill in the sale price and mileage, then sign. Crucial part: your signature has to be notarized. Don't let the buyer drive off without that stamp. Then, make sure you report the sale to the MVC online right away to wash your hands of it. Get a bill of sale notarized too, just for your records.

The most common mistake is signing in the wrong spot. Turn the title over. You’ll see a boxed area with lines for the date, selling price, and odometer reading. That’s where you sign. It feels like a lot of paperwork, but it’s straightforward: sign your name exactly as it's printed on the front, and do not do this without a notary present. The notary stamp is what makes it official for the state. The buyer handles the rest from there.

I just went through this last month. It’s the back of the pink title, but you can’t just sign anywhere. There’s a specific section for the seller. We met the buyer at our bank, so the teller could notarize our signatures on the title and the bill of sale right there. Made it super easy. The peace of mind is worth the small fee. Don’t forget to go online to the NJ MVC website afterward and report that you sold the car. It takes two minutes and saves a huge headache.

Legally, the signature must be placed on the reverse side of the New Jersey Certificate of Title in the assignment section. The transaction is not valid without a notary public's seal verifying the seller's signature. This requirement is a key consumer protection measure to prevent title fraud. Additionally, a completed bill of sale, while not always mandatory for the buyer, is critical documentation for the seller to prove the date of sale and finalize their liability for the vehicle under state law.


