Idaho vehicle — quick answer
In Idaho, a vehicle bill of sale is recommended and notarization of the title transfer is situational. The state form used for titled vehicles is ITD 3738. Titling and registration are handled by the Idaho ITD.
Is a vehicle bill of sale required in Idaho?
Recommended. A bill of sale is recommended and used to support the title transfer.
Seller signs the title; the buyer titles at the county assessor (DMV) office.
Does a Idaho vehicle bill of sale need to be notarized?
Situational (situational). Notarization is required only when the title transfer is completed by mail. In person, a county deputy can witness the signature instead.
What to include on a Idaho vehicle bill of sale
- Full legal names and addresses of the buyer and seller
- Year, make, model, color, and body style
- Vehicle Identification Number (VIN) — 17 characters
- Exact odometer reading on the date of sale
- Sale price (or "gift") and payment method
- Date of sale and signatures of both parties
How to transfer a vehicle in Idaho
- 1Complete the bill of sale and title assignment.
Record the buyer, seller, price, odometer, and date. Both parties sign and date.
- 2Hand over the signed title.
Seller signs the title; the buyer titles at the county assessor (DMV) office.
- 3Register with the Idaho ITD.
The buyer titles and registers the vehicle, bringing Bill of Sale. Confirm current fees on the official page.
Odometer disclosure
Federal law requires a written odometer disclosure when title is transferred for vehicles less than 20 years old. As of 2026 that means model year 2011 and newer; model year 2010 and older are generally exempt. Record the exact mileage — never round it. See the NHTSA rule.
Official sources
Requirements change and can vary by county. Confirm with the Idaho ITD before you sign. Not legal advice.
Idaho Vehicle Bill of Sale — FAQ
Is a vehicle bill of sale required in Idaho?
A bill of sale is recommended in Idaho. A bill of sale is recommended and used to support the title transfer.
Does a Idaho vehicle bill of sale need to be notarized?
Sometimes. Notarization is required only when the title transfer is completed by mail. In person, a county deputy can witness the signature instead.
Do I need a bill of sale to register a car?
It depends on your state. Many states accept the signed-over title alone, while others require a bill of sale to confirm the purchase price for sales tax. Our state pages tell you exactly what your DMV expects.
Does a vehicle bill of sale need to be notarized?
In most states, no. A handful of states require the title assignment to be notarized for a private sale: Louisiana, Ohio, Pennsylvania, North Carolina, and Kentucky. A few others require notarization only in specific tax situations.
Is a bill of sale proof of ownership?
Generally no. For titled property like a car or boat, the title is what proves ownership. A bill of sale proves that a sale happened and records the price, date, and terms — it supports the title transfer but does not replace it. For untitled property (furniture, equipment, electronics), the signed bill of sale is usually the main proof of ownership.