A bill of sale is the cheapest insurance in a private car sale — one page, no fee, five minutes. It is also widely misunderstood: it is not what transfers ownership, and in a handful of states it is not optional at all.
Ownership of a titled vehicle moves on the certificate of title. In nearly every state the assignment is printed on the back of the title itself, and there is no separate transfer form — New Jersey's MVC, for instance, has the seller sign the seller's section on the reverse and hand it over, with the bill of sale as the supporting record of buyer, date, odometer and price (NJ MVC). A bill of sale with no assigned title behind it conveys nothing.
What it does do is fix a date and a price in writing, signed by both people. That matters later, when the question is whether the car was still yours on the day something happened. Nevada's DMV says the Bill of Sale (VP-104), together with the registration cancellation and resale notification, are “your proof that you sold the vehicle” (Nevada DMV). Alabama, which has no release-of-liability filing at all, tells sellers who get an insurance-verification notice on a car they already sold to bring documentation — “bill of sale, etc.” — to clear it (ALDOR). That is the whole job: it is the thing you produce when someone claims you still own a car you don't.
Most states treat it as recommended. A few build it into the law, and the rules differ enough that you should check your own state hub rather than assume.
Then there are the cars with no title to sign. New Hampshire does not title model year 1999 or older vehicles — they sell on the Report of Sale or Transfer of a Non-Titled Motor Vehicle, TDMV 22A (NH DMV). Vermont vehicles model year 2009 or older with a Vermont registration need no title either; the registration certificate plus a signed bill of sale is the transfer (Vermont DMV). Rhode Island titled everything only from January 1, 2024, so some older RI cars legitimately have none (RI DMV). And in Oklahoma, a vehicle on an electronic title sells using the Electronic Title Bill of Sale (Form 718) in place of a paper title — notarized (Service Oklahoma).
Buyers sometimes ask the seller to write down a smaller price. In most states this accomplishes nothing except creating a document that contradicts the money that actually moved. Connecticut computes the buyer's tax on the NADA average trade-in value or the bill-of-sale price, whichever is higher (CT DMV). Rhode Island does the same at 7% against NADA Clean Retail (RI DMV). Mississippi taxes casual sales on a pre-determined value for the vehicle, not the price on the paper at all (Mississippi DOR).
Where a genuinely low price is real, the bill of sale is how the buyer proves it — and that is usually the version that needs a notary. Maryland bases excise tax on book value for vehicles seven model years old or newer unless a notarized bill of sale, with a statement explaining the low price, verifies a figure $500 or more below book (Md. Transp. §13-809). West Virginia requires a notarized bill of sale (DMV-7-TR) plus copies of both licenses when a vehicle sells for under 50% of NADA Clean Book (WV DMV). Arkansas runs the benefit the other way: sell within 60 days before or after buying your next car and tax is owed only on the difference, claimed with a signed bill of sale (Arkansas DFA). Sign an honest number.
Notarization of the title is a separate question from notarization of the bill of sale — Louisiana, Ohio, Oklahoma, Pennsylvania and Wyoming are among the states that put a notary or authorized agent in the middle of the transfer itself. The state-by-state notary table has the rest.
More than twenty states publish their own numbered form — New York's MV-912, Nevada's VP-104, Utah's TC-843, Vermont's VT-005, Montana's MV24, Indiana's 44237, New Mexico's MVD-10009, North Dakota's SFN 2888, South Dakota's 1025, among others. Use yours if it exists; it is free and nobody at the counter has to squint at it. Connecticut supplies H-31 but says plainly that no special form is required as long as the document carries the right content (CT DMV).
That content, drawn from what the states ask for: both parties' full names and addresses; year, make and model; the full VIN; the sale price in figures and words; the date of sale; the odometer reading; and both signatures. Rhode Island's FAQ adds color to the vehicle description (RI DMV). If you are selling the car as-is with no warranty, say so in one sentence — that sentence is the reason to bother when the buyer calls in three weeks about a noise.
Two habits worth keeping. Sign two copies so both people leave with an original. And never assign a title with the buyer's name left blank: in Georgia, delivering or accepting a title assigned in blank is a misdemeanor (Georgia DOR). The bill of sale and the assigned title should tell the same story, in the same handwriting, on the same day.
No. For a titled vehicle, ownership transfers when the seller completes the assignment on the certificate of title. The bill of sale is supporting evidence — date, price, parties, odometer. The exceptions are vehicles that are not titled at all, such as New Hampshire vehicles model year 1999 or older, which transfer on form TDMV 22A, or Oklahoma vehicles on an electronic title, which sell using the notarized Electronic Title Bill of Sale (Form 718).
Usually not. Most states take plain signatures — New York's MV-912 and Arkansas's Form 10-313 have no notary block anywhere on them. Notarization enters where a low price needs proving: Maryland requires a notarized VR-181 when it is used to establish purchase price, and West Virginia requires a notarized DMV-7-TR when a vehicle sells for under 50% of NADA Clean Book. Louisiana requires a notarized bill of sale when the price is not on the title assignment.
In most states, no — you keep it. Florida is the notable exception: sellers file HSMV 82050 with the county tax collector, and the liability protection only begins once it is filed. Missouri requires the sale reported within 30 days on Form 5049 or Form 1957. Several other states have their own separate seller notice instead, such as California's REG 138 (submit within five days) and Arizona's Sold Notice (within 10 calendar days).
Both parties' names and addresses, the year, make and model, the full VIN, the sale price, the date of sale, the odometer reading, and both signatures — plus an as-is statement if you are selling with no warranty. Connecticut's DMV lists essentially this set and notes that no special form is required as long as the information is there.
Yes. It costs nothing and it is the document you produce when a toll, ticket, or insurance notice arrives for a car you no longer own. States with no release-of-liability filing — Alabama, Maine, Mississippi, New Hampshire, New Jersey, Tennessee and others — explicitly point sellers to the signed title copy and bill of sale as their entire paper trail.