How to Register a Boat Without a Title in Montana: 5 Legal Pathways (2026)

Why You Might Not Have a Boat Title in Montana

Montana requires a Certificate of Ownership (title) for most motorboats, personal watercraft, and sailboats 12 feet or longer. But in practice, many boats end up in owners' hands without proper title documentation. Common situations include:

Inherited boats: A family member passes away and leaves a boat, but no one can locate the title among their personal effects. The boat may have been registered decades ago, and records may be incomplete.

Private purchases without paperwork: A buyer purchases a boat from a private seller who never had a title, lost the title, or simply signed over the vessel with only a handshake and cash — no Bill of Sale, no title.

Homemade or kit-built boats: Boats built from scratch or assembled from kits have no Manufacturer's Certificate of Origin (MCO) and no prior title history. They may also lack a Hull Identification Number (HIN).

Abandoned boats: A vessel is found abandoned on private property or at a marina. The previous owner cannot be located, and there are no ownership documents.

Out-of-state boats from no-title states: Boats previously registered in states that do not issue titles — such as Idaho, Wyoming, North Dakota, or South Dakota — arrive in Montana with only a registration card. Montana requires a title, but there is no title to transfer.

Montana provides five legal pathways to establish ownership and register a boat without a traditional title document. Each pathway applies to different situations. For the standard title transfer process when you do have a title, see our Montana boat title transfer guide.

The 5 Legal Pathways to Register Without a Title

The following diagram outlines the five pathways available in Montana for registering a boat without a Certificate of Ownership:

Pathway 1: Bill of Sale + Previous Registration

This is the most common pathway for boats purchased privately without a title. If the seller provides you with a signed Bill of Sale and the boat was previously registered (either in Montana or another state), you can use these documents to apply for a new Montana Certificate of Ownership.

What you need: A Bill of Sale signed by the seller that includes the date of sale, purchase price, full names and addresses of both buyer and seller, vessel description (make, model, year, HIN), and the seller's signature. If the boat was previously registered, bring the previous registration card or a printout from the prior state.

Process: Take the Bill of Sale, any prior registration documents, and a completed MV1A form to your County Treasurer's Office. The County Treasurer will verify the vessel information and process your application. If the seller's identity and the vessel history can be confirmed through registration records, the title will be issued without additional requirements.

Important: The Bill of Sale should be as detailed as possible. Vague documents — a handwritten note saying "sold boat to John" without HIN, price, or addresses — may not be sufficient. If the County Treasurer cannot verify ownership through the Bill of Sale alone, you may need to pursue Pathway 3 (bonded title) instead.

Pathway 2: Out-of-State Registration from a No-Title State

Montana's four neighboring states — Idaho, Wyoming, North Dakota, and South Dakota — do not issue boat titles. They use registration-only systems where the registration card serves as the primary ownership document. When you bring a boat from one of these states to Montana, there is no title to transfer.

What you need: The current out-of-state registration card (valid and in your name), a signed Bill of Sale from the seller, a completed MV1A application, and your photo ID.

Process: The out-of-state registration card serves as proof that the vessel was legally owned and operated in the previous state. The County Treasurer uses this registration, combined with the Bill of Sale, to establish your ownership and issue a Montana Certificate of Ownership.

This pathway is straightforward because the County Treasurer can verify the vessel's registration history through inter-state databases. Most applications through this pathway are processed without complications. For more on each neighbor's system, visit our pages for Idaho, Wyoming, North Dakota, and South Dakota boat registration.

Pathway 3: Bonded Title (Surety Bond)

When you cannot prove ownership through standard documents — no title, no registration, no credible Bill of Sale — Montana may allow you to apply for a bonded title. This involves purchasing a surety bond that protects any future claimant who may have a legitimate ownership interest in the vessel.

When this pathway applies: Boats purchased at informal sales with no documentation, boats found abandoned, or situations where the seller cannot be located to provide a Bill of Sale. The bonded title is a last resort when Pathways 1 and 2 are not available.

How it works: You purchase a surety bond from a licensed insurance company for 1.5 times the vessel's fair market value (determined by NADA Guide values or professional appraisal). For example, a boat valued at $10,000 would require a bond of approximately $15,000. The bond premium (the amount you actually pay) is typically 1% to 5% of the bond amount, so $150 to $750 in this example.

Bond duration: The bond remains active for 3 years in Montana. If no legitimate ownership claim is filed against the vessel within those 3 years, the bond is released and your title becomes a standard (unbonded) Montana Certificate of Ownership.

Process: Contact your County Treasurer to determine if a bonded title is appropriate for your situation. Obtain the surety bond from a bonding company, complete the MV1A form, and submit all documents along with the bond certificate to the County Treasurer.

Pathway 4: Court Order

A court order from a Montana court can establish ownership and direct the County Treasurer to issue a title. This pathway is typically used for:

Inherited boats without probate documentation: When a deceased person's boat was never included in estate proceedings and the title cannot be located, a probate court can issue an order transferring ownership to an heir.

Mechanic's or storage liens: When a boat is abandoned at a repair shop or marina and the owner cannot be located after proper legal notice, the business may file for a lien foreclosure. The court grants ownership to the lien holder.

Ownership disputes: When two parties claim the same vessel and neither can produce definitive title documentation, a court can determine rightful ownership.

Process: You will need to hire an attorney to file the appropriate motion with the district court in the county where the vessel is located. The court will review evidence of ownership (bills of sale, cancelled checks, insurance records, photographs, witness testimony) and issue an order. This order is then presented to the County Treasurer along with the MV1A application.

Cost and timeline: Court-ordered titles involve attorney fees ($500-$2,000+), court filing fees, and typically take 2-6 months to complete. This pathway is best reserved for higher-value vessels where the cost of legal proceedings is justified.

Pathway 5: Homemade Boats and HIN Assignment

Homemade, kit-built, or heavily modified boats typically have no prior title, no MCO, and often no Hull Identification Number (HIN). Montana provides a specific pathway for these vessels:

Step 1 — Build documentation: Gather all receipts, photographs, and records that demonstrate you built or assembled the vessel. If you purchased a kit, keep the kit manufacturer's documentation.

Step 2 — HIN assignment: Contact the Montana Department of Justice or a local FWP office to arrange a Hull Identification Number inspection and assignment. The inspector will verify the vessel exists, measure its dimensions, note its construction, and assign a unique HIN. This HIN will follow the federal 12-character format.

Step 3 — Apply for title: Take your building documentation, the HIN assignment paperwork, a completed MV1A form, and payment to the County Treasurer's Office. Since you are the original builder with no prior owner, no Bill of Sale from a previous owner is required — your building records establish original ownership.

Motorized homemade boats: If your homemade boat has any type of motor (even a small electric trolling motor), it must be titled and registered before operating on Montana public waters. There are no size exemptions for motorized homemade vessels.

Non-motorized homemade boats: If your homemade boat is strictly non-motorized (no electric motor, no gas motor), it does not require a title or registration in Montana. However, non-residents must still purchase an AIS Prevention Pass ($10). For more on non-motorized rules, see our guide on Montana kayak registration rules.

Which Pathway Is Right for You?

Use this decision guide to determine the best pathway for your situation:

For all pathways, remember that Montana charges no sales tax on the purchase — saving you thousands compared to neighboring states. For more on Montana's tax advantages, see our guide on Montana boat sales tax.

What If the HIN Is Missing or Illegible?

Every titled boat in Montana must have a Hull Identification Number (HIN) — a 12-character alphanumeric code stamped on the starboard side of the transom. If your boat's HIN is missing, damaged, or illegible, you must get one assigned or verified before any title pathway can proceed.

Where to find the HIN: The primary HIN is on the upper starboard (right) side of the transom. A secondary hidden HIN may be located inside the hull, under a fitting or thwart. Both locations are standard on boats manufactured after November 1, 1972 (when federal HIN requirements took effect).

No HIN at all: Contact your local FWP office or the Montana Department of Justice to schedule an inspection. An authorized officer will inspect the vessel, confirm its existence, and assign a new Montana HIN. This applies to homemade boats, pre-1972 boats, and boats where both HIN locations have been defaced.

Cost: HIN inspections and assignments are typically free or very low cost. However, if the vessel is suspected of being stolen (HIN intentionally removed or altered), law enforcement may impound the vessel for investigation.

Common Mistakes to Avoid

1. Buying without any documentation: Always insist on at minimum a signed Bill of Sale from the seller, even in casual private sales. A Bill of Sale costs nothing to create and saves thousands in bonding fees or legal costs down the road.

2. Assuming registration equals title: In Montana, the registration card is not the same as the title. You need the Certificate of Ownership (title) for legal ownership. A boat registered in Montana without a title in your name is not legally yours.

3. Purchasing a potentially stolen vessel: Before buying any untitled boat, run the HIN through your County Treasurer or local law enforcement to check for theft reports. If the boat turns out to be stolen, you lose both the boat and your money — there is no buyer protection for stolen property.

4. Waiting too long after purchase: Montana requires title applications within 40 days of purchase. Waiting longer complicates the process and may result in penalties.

5. Not getting a duplicate before selling: If you are the seller and have lost your Montana title, apply for a duplicate Certificate of Ownership through the County Treasurer before listing the boat for sale. This is much easier than forcing the buyer to go through Pathway 3.