What a car bill of sale is and why you need one in Illinois
A bill of sale is a written record that you sold a car to someone else, or that someone sold a car to you. In Illinois, a bill of sale is not required by law to transfer ownership of a vehicle — the title document itself is what the state recognizes as proof of ownership. However, a bill of sale protects both the buyer and seller by creating a paper trail of the transaction, including the price paid, the date, and the condition of the car at the time of sale.
Without a bill of sale, disputes can arise later. A seller might claim they never received full payment. A buyer might dispute the condition of the car or whether certain repairs were promised. If you are buying or selling a car in Illinois, a bill of sale gives you written proof of what was agreed to and when the responsibility for the vehicle changed hands.
The bill of sale is separate from the title. The title is the official state document that shows who owns the car. The bill of sale is your personal record of the sale itself. You will need both documents to complete a car sale in Illinois.
Key Takeaways
- A bill of sale is a written record of a car sale that protects both buyer and seller, even though Illinois law does not require one.
- The bill of sale should include the vehicle identification number (VIN), the sale price, the date of sale, and the signatures of both buyer and seller.
- You can write a bill of sale yourself on plain paper or use a template — Illinois does not have an official state form.
- The buyer needs the bill of sale along with the signed title to register the car with the Illinois Secretary of State.
- Keeping a copy of the signed bill of sale protects you if questions arise later about the sale price, condition, or when ownership transferred.
What information to include on an Illinois car bill of sale
Your bill of sale should contain specific details about the car and the transaction. Start with the vehicle identification number (VIN), which appears on the title and on the dashboard of the car. Include the year, make, model, and color. Write down the current odometer reading — this documents the mileage at the time of sale.
Next, record the sale price in words and numbers. For example: "Five thousand dollars ($5,000.00)." Include the date of the sale. Add the full names and addresses of both the seller and the buyer. If the buyer is financing the car through a bank or credit union, note that on the bill of sale as well.
Include a line for the condition of the car — for instance, "sold as-is" or a description of any known issues. This prevents the buyer from claiming later that you promised repairs you never made. Both the seller and buyer should sign and print their names. Some people also add the date each person signed, in case the signatures were not added on the same day.
How to write your own bill of sale or use a template
Illinois does not have an official state bill of sale form. You can write one yourself on plain paper, or you can find a template online. Many free templates are available through the Illinois Secretary of State website, legal document sites, or even through some car-buying resources. The template approach is often easier because it reminds you what sections to include.
If you write your own, use clear, straightforward language. Avoid legal jargon unless you are certain of what it means. Write in black or blue ink if you are handwriting it — this makes it easier to photocopy and harder to alter later. Type it if possible, as typed documents are clearer and less likely to be disputed.
Make sure both the buyer and seller sign the document. Some people have the signatures notarized, which means a notary public witnesses the signing and stamps the document. Notarization is not required in Illinois, but it adds an extra layer of proof that both parties actually signed it.
What happens to the bill of sale after the sale
After you sign the bill of sale, make at least two copies — one for the seller and one for the buyer. Keep your copy in a safe place. The buyer will need to bring the bill of sale to the Illinois Secretary of State when registering the car. The Secretary of State does not keep the bill of sale on file; it is the buyer's record of the transaction.
If you are the seller, keep your copy for at least three to five years. If a question arises about the sale — for instance, if the buyer claims the car was damaged before they took it, or if there is a dispute about the price — your signed copy of the bill of sale is your proof of what was agreed to.
If you are the buyer, bring your copy of the bill of sale along with the signed title to the Secretary of State's office or submit them online through the Illinois Secretary of State website. The bill of sale shows the state that you purchased the car legitimately and establishes the date of ownership transfer.
The difference between a bill of sale and a title in Illinois
The title is the official state document issued by the Illinois Secretary of State that proves who owns the car. It has a specific format, a title number, and security features to prevent fraud. When you buy a car, the seller signs the back of the title, and you submit that signed title to the Secretary of State to register it in your name.
The bill of sale is a private document between you and the other party. It records the details of the transaction — price, date, condition — but it is not filed with the state. The bill of sale supports the title by documenting what happened during the sale.
Think of it this way: the title is your proof of ownership. The bill of sale is your proof of how you became the owner. You need both to complete a legal car sale in Illinois.
When a bill of sale is especially important
A bill of sale becomes critical in private sales between individuals, rather than purchases from a dealership. When you buy from a dealer, the dealer handles the paperwork and provides documentation. When you buy from a private seller, you are responsible for creating your own record of the transaction.
A bill of sale is also important if the sale price is significantly different from the car's market value. If you are buying a car for far less than it is worth, a bill of sale documents that the low price was intentional and agreed to by both parties. This protects you if someone later questions whether the sale was legitimate.
If you are selling a car and the buyer is paying in cash, a bill of sale creates a record that you received payment and transferred the car on a specific date. This protects you if the buyer later claims they never paid or if they have an accident and try to hold you responsible.
Frequently Asked Questions
Do I have to notarize a bill of sale in Illinois?
No, notarization is not required by Illinois law. However, having a notary public witness the signatures adds credibility to the document if a dispute arises later. Some people choose to notarize for extra protection, especially in high-value sales.
What if I lose my copy of the bill of sale after the sale?
If you are the seller and lose your copy, you no longer have proof of the transaction. If a problem arises later, you will have a harder time defending yourself. If you are the buyer and lose your copy, you can request a duplicate from the seller, or you can check your registration records with the Illinois Secretary of State to confirm the ownership transfer date.
Can I use a bill of sale from another state?
Yes, you can use a bill of sale template from another state, but make sure it includes all the information Illinois requires: VIN, sale price, date, buyer and seller names and addresses, and signatures. The format does not matter as long as the content is complete and both parties sign it.
Does the bill of sale need to match the price on the title?
The bill of sale and the title do not have to show the same price. The title does not typically show a sale price at all — it just shows ownership. The bill of sale is where you record what was actually paid. Keep the bill of sale accurate to the real transaction price.
What if the buyer and seller sign the bill of sale on different days?
It is better if both sign on the same day, but it is not illegal for them to sign on different days. If they do sign separately, write the date each person signed next to their signature. This shows the order in which the signatures were added and can help clarify the timeline if a dispute arises.