A bill of sale is a written record that you and the seller sign to prove who owned the car, when the ownership changed, and what was paid for it.
It is not the same as a title document — the title is what the state issues to show legal ownership. A bill of sale is a private agreement between you and the seller that creates a paper trail. When you buy a used car from a private person (not a dealership), a bill of sale protects both of you by documenting the transaction in writing. It shows the date, the vehicle details, the sale price, and the signatures of both parties. If a dispute arises later — about condition, payment, or who owned the car on a specific date — the bill of sale is your evidence.
Many states do not require a bill of sale by law, but that does not mean you should skip it. Dealerships usually handle this paperwork for you, but private sales almost never do. Without one, you have no proof of when you bought the car or what you paid, which can create problems with insurance, taxes, and resale.
Key Takeaways
- A bill of sale is a written agreement between buyer and seller that documents the vehicle details, sale price, date, and both signatures.
- It is not required by law in most states, but it protects you by creating proof of the transaction if disputes arise later.
- You should obtain a bill of sale before you hand over money in a private car sale, and keep it with your title and insurance documents.
- The bill of sale does not transfer ownership — only the title document does — but it proves when and how the sale happened.
- If the seller refuses to sign a bill of sale, that is a red flag that something may be wrong with the car or the sale itself.
What information goes on a bill of sale
A bill of sale should include the vehicle identification number (VIN), the make, model, year, and color of the car. It should also show the odometer reading at the time of sale, the sale price in dollars, and the date of the transaction. Both the buyer and seller print their full names, addresses, and signatures. Some versions include the condition of the car (as-is, with warranty, etc.) and whether any repairs or issues were discussed.
You do not need a fancy legal form. Many states provide a straightforward template on their motor vehicle department website, and you can read and print it. Some people write the details on a plain sheet of paper, have both parties sign it, and that counts as a bill of sale. What matters is that the essential information is there and both parties have signed it. Keep the original for your records and give a copy to the seller.
When you need a bill of sale and when you do not
If you are buying from a dealership, they will create the paperwork for you — usually a buyer's order or sales contract that serves the same purpose. You do not need to create a separate bill of sale. If you are buying from a private seller, you should create one before money changes hands.
Some states require a bill of sale to register the vehicle or transfer the title. Check your state's motor vehicle department website to see whether it is mandatory where you live. Even if it is not required, having one protects you. If you sell the car later and the new buyer has a problem, or if the original seller claims you still owe money, the bill of sale proves the sale was complete and final.
How a bill of sale differs from a title
The title is the official government document that proves who owns the car. Only the state motor vehicle department can issue a title, and only the person named on the title is the legal owner. A bill of sale is a private record between you and the seller — it does not transfer ownership by itself.
Here is the sequence: you and the seller sign a bill of sale to document the sale. Then you take that bill of sale, along with the seller's title document, to your state's motor vehicle department to register the car in your name. The state then issues a new title with your name on it. The bill of sale proves the transaction happened; the title proves you own it now. Both matter, but they do different jobs.
Red flags that mean you should not buy the car
If a seller refuses to sign a bill of sale, that is a serious warning sign. A legitimate seller has no reason to avoid a straightforward written record. Refusal suggests the seller may be hiding something — unpaid loans on the car, undisclosed damage, or intent to sell the same car to multiple buyers.
Similarly, if the seller cannot produce the title or says it is "in the mail," do not hand over money. If the title has a lien on it (meaning a bank or lender still owns the car), the seller cannot legally transfer ownership to you until that lien is paid off. A bill of sale does not protect you from these problems — only the title document will show them. Always see the title in person before you buy, and always get a bill of sale signed at the same time.
How to fill out a bill of sale correctly
Start by getting a blank bill of sale form. Your state's motor vehicle department website usually has one, or you can find a generic template online. Print it out and fill in the blanks with a pen (not pencil, so it cannot be altered later). Write clearly and spell out numbers when possible — for example, write "Five thousand dollars" as well as "$5,000".
Have the seller fill in their information and sign in front of you. You sign as the buyer. Do not leave any blanks — if a field does not explore, write "N/A" or draw a line through it. Make a photocopy for yourself and give the original to the seller. Keep your copy with your title documents, insurance papers, and maintenance records. If you ever need to prove when you bought the car or what you paid, the bill of sale is your evidence.
What happens if you lose the bill of sale
If you lose your copy of the bill of sale after the sale is complete, it is not a crisis — you still own the car because your name is on the title. However, you lose the written proof of when you bought it and what you paid. This can matter if you need to file an insurance claim, report the car stolen, or prove the sale date for tax purposes.
If you need a copy and the seller will not provide one, you may be able to get a duplicate from your state's motor vehicle department if you filed the bill of sale with your title transfer. Some states keep copies on file. Contact your local motor vehicle office to ask what records they have. Going forward, keep your bill of sale in a safe place — a file folder, a safe deposit box, or a digital scan stored securely online.
Frequently Asked Questions
Do I need a bill of sale if I buy from a dealership?
No. Dealerships provide a buyer's order, sales contract, or similar document that serves the same purpose. That paperwork is your proof of the transaction. You do not need to create a separate bill of sale.
Can I use a bill of sale instead of a title to prove I own the car?
No. A bill of sale proves you bought the car, but only the title proves you own it. You must register the car and have the state issue a title in your name. The bill of sale is the first step; the title is the legal proof of ownership.
What if the seller and I disagree on the sale price after we sign?
The bill of sale is a binding record of what you both agreed to. If the seller claims you owe more money or tries to take the car back, the bill of sale is your evidence that the sale was final and complete at the price you both signed.
Is a bill of sale the same as a purchase agreement?
They are similar but not identical. A purchase agreement may include terms like warranty, repair promises, or contingencies. A bill of sale is simpler — it just documents that the sale happened, who was involved, and what was paid. Many private sales use a bill of sale; more formal transactions use a purchase agreement.
Can I write a bill of sale on any piece of paper?
Yes. As long as it includes the vehicle details, sale price, date, and both signatures, a handwritten bill of sale on plain paper is valid. Using your state's official form is safer because it includes all required fields, but a straightforward written record works if it has the essential information.