What a California bill of sale is and when you need one

A bill of sale is a written record that you and another person have exchanged a vehicle for money or other value. In California, it is not required by law to complete a sale — the state does not mandate it — but it protects both the buyer and seller by documenting the transaction, the vehicle details, the price, and the date. Without one, either party has little proof of what was agreed to if a dispute arises later.

You should use a bill of sale whenever you buy or sell a vehicle privately in California, whether it is a car, truck, motorcycle, or RV. If you are trading through a dealership, the dealer handles the paperwork. If you are selling to or buying from another individual, a bill of sale is your protection and evidence of the deal.

The bill of sale also serves as a record for the California Department of Motor Vehicles (DMV) when you transfer the title. While the DMV does not require you to submit the bill of sale itself, you will need the information from it to complete the title transfer form, and having the document in hand makes that process faster and more accurate.

Key Takeaways

  • California does not legally require a bill of sale, but creating one protects both buyer and seller by documenting the vehicle, price, date, and condition of the sale.
  • You can write a bill of sale by hand on plain paper or use a template from the California DMV website or a third-party source; either format is acceptable.
  • The bill of sale must include the vehicle identification number (VIN), make, model, year, sale price, buyer and seller names and addresses, and the date of sale.
  • The seller should keep a copy for their records, and the buyer needs a copy to present when transferring the title at the DMV.
  • A bill of sale does not transfer ownership in California; the title transfer form (process for Title or Registration) filed with the DMV is what legally transfers the vehicle.

What information to include in a California bill of sale

Your bill of sale must contain specific details about the vehicle and the transaction. Start with the vehicle itself: the year, make, model, color, and most importantly, the Vehicle Identification Number (VIN). The VIN is a 17-character code found on the driver's side dashboard, the door jamb, or the title document itself. Without the VIN, the DMV cannot process the title transfer accurately.

Next, record the sale details: the purchase price, the date of sale, and the condition of the vehicle (for example, "as-is" or "good working condition"). Include the full names, addresses, and phone numbers of both the buyer and the seller. If either party is a business, use the business name and the authorized person's name. Both parties should sign and date the document.

You may also note whether any liens exist on the vehicle (money still owed to a lender), whether the odometer reading is accurate, and any known mechanical or cosmetic issues. These details are not required by law but can prevent misunderstandings and disputes after the sale.

How to create a bill of sale in California

You have two main options: write one yourself or use a template. If you write it by hand, use plain paper and include all the information listed above. Write clearly so that names, the VIN, and the price are straightforward to read. Handwritten bills of sale are legally valid in California as long as both parties sign them.

Alternatively, read a bill of sale template from the California DMV website (dmv.ca.gov) or from a reputable third-party source. Many templates are free and follow the format the DMV recognizes. Fill in the blanks with the correct information, print it, and have both parties sign and date it. Some people use online document services, but make sure the template is specific to California and includes all required fields.

Do not leave blanks or use "X" marks instead of actual information. The more complete and legible the document, the fewer problems you will face when the buyer goes to the DMV to transfer the title. If you make a mistake, cross it out neatly, initial the change, and have both parties initial it as well — do not use white-out or erasers.

Signing and witnessing the bill of sale

California does not require a bill of sale to be notarized or witnessed by a third party. Both the buyer and seller straightforward need to sign and date the document in front of each other. However, having a witness sign as well adds an extra layer of protection, especially if the sale price is high or if either party suspects future conflict.

If you choose to have the document notarized, a notary public will verify the identities of both parties and witness the signatures. This costs money (typically $10 to $20 per signature) but creates a certified record that is harder to dispute. Some people notarize bills of sale for expensive vehicles or when selling to someone they do not know well.

Make sure both parties receive a signed copy. The seller should keep one for their records, and the buyer must have one to bring to the DMV when registering the vehicle or transferring the title. If either party loses their copy, the other can provide a duplicate, but it is better to have your own from the start.

How the bill of sale connects to the DMV title transfer

The bill of sale itself does not transfer ownership of the vehicle. Ownership transfers only when the DMV processes the title transfer. The buyer must file an process for Title or Registration (Form REG 343) with the DMV within 10 days of purchase. The bill of sale provides the information needed to fill out this form accurately.

When the buyer goes to the DMV, they will bring the bill of sale, the original title signed by the seller, proof of identity, proof of residence, and the completed registration form. The DMV uses the bill of sale as supporting documentation to confirm the sale details match what is on the title and the registration form. If the information does not match — for example, if the VIN on the bill of sale differs from the VIN on the title — the DMV will reject the process and ask for clarification.

The seller should also keep their copy of the bill of sale. If the buyer does not transfer the title promptly and the vehicle is involved in an accident or traffic violation, the seller may need to prove they no longer own it. The bill of sale, along with a statement to the DMV, can help protect the seller from liability.

Common mistakes to avoid when writing a bill of sale

The most frequent error is an incorrect or incomplete VIN. Double-check the VIN against the title document and the vehicle itself before writing it down. A single wrong digit can cause the DMV to reject the title transfer process, delaying registration and creating frustration for the buyer.

Another mistake is leaving the price blank or writing "cash" instead of a specific amount. The DMV and the buyer's insurance company may need to know the sale price. If you leave it blank, the buyer may have to return to the seller to fill it in, or the DMV may refuse to process the transfer without it.

Do not forget to include the date of sale. This date matters for insurance purposes and for the DMV's records. If the bill of sale is undated, it is harder to prove when the ownership transfer occurred. Also, avoid using abbreviations for the buyer's or seller's names; spell out full legal names as they appear on identification documents.

What happens if you sell a vehicle without a bill of sale

Selling without a bill of sale is legal in California, but it leaves both parties vulnerable. The seller has no written proof they sold the vehicle, which can create problems if the buyer fails to register it and the vehicle is later involved in a crime or accident. The seller may be held liable or contacted by law enforcement. The buyer, meanwhile, has no documentation of the purchase price or condition, which can complicate insurance claims or disputes with the seller.

If you have already sold a vehicle without a bill of sale and need to document the transaction after the fact, you can create one and have both parties sign it. This retroactive bill of sale is not as strong as one signed at the time of sale, but it is better than nothing. Both parties should note on the document that it is being signed after the sale to acknowledge what occurred.

Frequently Asked Questions

Can I use a bill of sale from another state in California?

A bill of sale from another state is not invalid in California, but it may not include all the information the California DMV expects. It is safer to use a California-specific template or to rewrite the information on a California bill of sale form to may support nothing is missing and the DMV will accept it without delay.

Do I need to register the bill of sale with the DMV?

No. You do not submit the bill of sale to the DMV. You keep it as your record of the transaction. The buyer uses the information from it to complete the title transfer form, but the bill of sale itself stays with you or the buyer, not filed with the state.

What if the seller will not sign the bill of sale?

If the seller refuses to sign, do not complete the purchase. A bill of sale protects you as the buyer. Without it, you have no written proof of the agreement, the price, or the vehicle condition. Walk away or insist on a signed bill of sale before handing over money.

Can I sell a vehicle with a lien on it using a bill of sale?

Yes, but the lien must be paid off before the title can be transferred to the buyer. The bill of sale should note that a lien exists. Typically, the sale proceeds go to the lender to clear the debt, and then the lender releases the title so the buyer can register it. Consult with the lender about their process for handling the sale.

Is a bill of sale the same as a title?

No. A bill of sale is a record of the sale transaction. The title is the legal document that proves ownership of the vehicle. The title is issued by the DMV and must be signed over by the seller and transferred by the buyer through a formal DMV process. You need both documents to complete a vehicle sale in California.