Idaho trailer — quick answer
In Idaho, a trailer 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 trailer 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 trailer 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 trailer bill of sale
- Buyer and seller names and addresses
- Year, make, and trailer type
- VIN or serial number
- Length, number of axles, and empty weight
- Price, date, and signatures
How to transfer a trailer in Idaho
- 1Complete the bill of sale and title assignment.
Record the buyer, seller, price, 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 trailer, bringing Bill of Sale. Confirm current fees on the official page.
Official sources
Requirements change and can vary by county. Confirm with the Idaho ITD before you sign. Not legal advice.
Idaho Trailer Bill of Sale — FAQ
Is a trailer 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 trailer 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 to title a trailer?
It depends on the trailer’s weight and your state. Heavier trailers usually require a title and registration; many small utility trailers only need registration. Check your state page.
What if my trailer has no VIN?
Homemade or older trailers may need a state inspection to be assigned a VIN before they can be titled. The bill of sale still documents the sale in the meantime.
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.