By Mohamed SkhiriUpdated November 10, 2026Checked against Connecticut DMV's bill of sale and proof-of-ownership pages
Why Connecticut insists on a bill of sale
Connecticut DMV's proof-of-ownership rules say a bill of sale, its form H-31, is required along with proof of ownership to process a new registration. So for a buyer, the bill of sale isn't optional paperwork in Connecticut: without one, the registration doesn't go through. The same page lists a Supplemental Assignment of Ownership, form Q-1, as the alternative document in some cases.
The fields Connecticut DMV looks for
DMV's page for sellers says there's no special form required for a private sale. A bill of sale you write yourself is acceptable if it includes:
- the buyer's name and address,
- the seller's name and address,
- the vehicle description: make, model, year and color,
- the vehicle identification number,
- the sales price,
- the date of sale, and
- the seller's signature.
The form above has a field for each one, so a completed copy covers what a Connecticut registration needs. It also adds what DMV's list doesn't require but a buyer will want: the plate, the odometer reading with the federal mileage statement where it applies, an as-is clause and the buyer's signature. If you'd rather use the state's own H-31, it's on DMV's forms page; either one satisfies the requirement.
Filling it in for a CT registration
Connecticut is already selected. Add the town or county, both parties' full names and street addresses, and copy the vehicle's make, model, year, color and VIN from the title. Write the actual price, since DMV lists the sales price as a required item. Date it, print two copies, and have the seller sign both; the buyer keeps one copy for the registration visit.
Sellers can reuse the template for every car they sell, and it works for cars, trucks, vans and SUVs alike. Boats, trailers and campers have their own templates in our bill of sale library.
The title still has to be signed
A bill of sale proves the sale; it doesn't transfer a titled vehicle. DMV says the H-31 isn't to be used as an assignment of ownership for a titled vehicle, so the seller still signs the title over to the buyer, and the buyer brings both documents. For older or non-titled vehicles, the H-31 or the Q-1 is used together with the previous owner's registration instead.
For a CT bill of sale PDF, save the finished document from the print window; that CT bill of sale PDF is identical to the printout. The Word download is there if you want to adjust the wording, and the blank print lets you fill it in by hand. The template is free for buyers and sellers alike, and everything stays in your browser.
Connecticut bill of sale FAQ
Does Connecticut require a bill of sale to register a car?
Yes. Connecticut DMV says a bill of sale (its form H-31), along with proof of ownership, is required to process a new registration.
Do I have to use form H-31?
No. For a private sale, DMV says no special form is required, as long as your bill of sale includes both parties' names and addresses, the make, model, year, color and VIN, the price, the date of sale and the seller's signature.
Does a bill of sale replace the Connecticut title?
No. DMV says the H-31 isn't an assignment of ownership for a titled vehicle, so the seller still signs the title over to the buyer.
Sources
This page explains common rules and is not legal advice. Connecticut DMV has the final word.