To find out who owns a boat, you need the vessel’s Hull Identification Number or its state registration number, and then you request records from one of two places: the state agency that registers boats where the vessel operates, or the U.S. Coast Guard’s National Vessel Documentation Center. Which one depends on whether the boat is state-numbered or federally documented. Either way, privacy laws limit what a stranger can pull, and the fees run from a few dollars to about $25.
Start With the Hull Identification Number
The Hull Identification Number, or HIN, is a 12-character alphanumeric code the Coast Guard has required on all manufactured recreational boats since 1972.1U.S. Coast Guard Boating Safety. BSC70 It functions the way a VIN does on a car: one number, one hull, for life.
The primary HIN is stamped on the starboard outboard side of the transom. A duplicate is placed in an unexposed interior location or beneath a fitting, so a thief who grinds off the visible one still leaves evidence behind.2eCFR. 33 CFR Part 181 Subpart C – Identification of Boats You’ll also find the HIN printed on the boat’s title, registration certificate, or manufacturer’s certificate of origin.
If the boat is in front of you, check the transom first. If you only have paperwork, use whatever the documents show. Without a HIN or a state registration number, you have no way into either database.
Is the Boat State-Registered or Federally Documented?
Every boat sits in one system or the other, never both. The visible markings tell you which.
A state-registered boat displays a registration number on the bow along with a validation sticker. A federally documented vessel shows its name and hailing port on the exterior hull, with an official number permanently marked on an interior structural part of the hull.3eCFR. 46 CFR Part 67 Subpart I – Marking Requirements for Vessel Documentation
Federal documentation is only available to vessels of at least 5 net tons that are wholly owned by U.S. citizens or qualifying entities.4Office of the Law Revision Counsel. 46 USC 12103 – General Eligibility Requirements As a rough rule of thumb, most recreational boats 25 feet or longer meet the tonnage threshold. Yachts, larger sailboats, and commercial vessels are commonly documented. Smaller recreational boats are almost always state-registered.
Searching a State-Registered Boat
Any undocumented vessel with a motor has to be numbered in the state where it primarily operates.5Office of the Law Revision Counsel. 46 USC 12301 – Numbering Vessels Each state runs its own database, usually through the Department of Motor Vehicles, Department of Natural Resources, or a similar agency.
To search, you’ll need the HIN or the state registration number displayed on the bow. Some states offer online lookup; others require a written public records request or a specific form. Fees for individual record searches typically run between $7 and $15, with certified copies costing more. When a request goes through, the response usually includes the registered owner’s name and address, and sometimes lienholder information.
Why You May Not Get a Name
Most casual requests hit a wall here. The federal Driver’s Privacy Protection Act bars state agencies from releasing personal information from motor vehicle records unless the requester has a permissible purpose, such as use by a government agency, use related to vehicle safety or theft, or use in connection with legal proceedings.6Office of the Law Revision Counsel. 18 USC 2721 – Prohibition on Release and Use of Certain Personal Information From State Motor Vehicle Records In many states, boat registrations live in the same database as car registrations, so the same rules apply. Requests without a qualifying purpose are either redacted or denied outright.
If you’re a prospective buyer, the practical answer is to ask the seller for the title, registration, and identification. They should provide all three willingly. If you’re dealing with a boat that’s blocking your dock, leaking fuel, or sitting abandoned, law enforcement can access the restricted records on your behalf.
Searching a Federally Documented Boat
Ownership records for documented vessels are held by the Coast Guard’s National Vessel Documentation Center (NVDC). There’s a free public search tool, the CGMIX Port State Information Exchange (PSIX), which lets you look up vessels by name, HIN, official number, or call sign. The catch is that CGMIX is scrubbed of personally identifiable information before anything is published.7Department of Homeland Security. Privacy Impact Assessment Update for the Coast Guard Maritime Information eXchange (CGMIX) You’ll see vessel dimensions, documentation status, and inspection history, but no owner names or addresses.
For actual owner information, you request one of two documents from the NVDC through its eStorefront at dco.uscg.mil/nvdc:
- A Certified Copy of the Certificate of Documentation, which shows the current managing owner’s name and address, costs $4.
- An Abstract of Title, which shows the complete chain of ownership plus every recorded lien, mortgage, and title encumbrance, costs $25.8National Vessel Documentation Center. Table of Fees Revised 09-2025
If all you want is a name, the $4 certified copy is enough. If you’re thinking about buying the boat, spend the $25 on the Abstract of Title.
Buying a Used Boat: Check for Liens, Theft, and Title Washing
Knowing who owns a boat only answers half the question when money is about to change hands. You also need to know whether anyone else has a financial claim on the hull and whether the paper title reflects the boat’s real history.
For a documented vessel, the Abstract of Title is the definitive source for recorded preferred ship mortgages and liens.8National Vessel Documentation Center. Table of Fees Revised 09-2025 For a state-titled boat, lien recording practices vary widely, and some states have historically issued clean titles even for boats with damage history or unresolved claims. A federal effort called the Uniform Certificate of Title Act for Vessels aims to standardize what appears on state titles, including secured party information and damage brands, but fewer than ten jurisdictions have adopted it.9Federal Register. Uniform Certificate of Title Act for Vessels In states that haven’t, a clean title doesn’t guarantee a clean history.
Run the HIN through the National Insurance Crime Bureau’s free VINCheck tool before you buy. It cross-references the number against theft and salvage claims reported by participating insurers, and you get up to five searches per day at no cost.10National Insurance Crime Bureau. VINCheck Lookup It only covers records from insurers that participate in the NICB program, so an unreported theft or a claim filed with a non-participating company won’t appear, and it won’t show liens or repair history.
Also ask to see the bill of sale from the current owner’s purchase. It should list the HIN, the seller’s information, the sale price, and the date. Compare the HIN on the paperwork to the number stamped on the transom. A mismatch is one of the clearest warning signs of fraud or a stolen hull.
Found an Abandoned Boat? Don’t Search — Call
If the reason you’re trying to identify an owner is an abandoned or drifting vessel, skip the records request and contact the right agency directly. They can access data you can’t.
- If the boat is a navigation hazard, contact your nearest U.S. Coast Guard Sector Command Center.
- If it’s leaking fuel or other hazardous materials, call the Coast Guard National Response Center at 1-800-424-8802 and notify your state environmental response agency.
- For general abandonment on your property or at a marina, report it to local law enforcement or harbor patrol.11NOAA. Abandoned and Derelict Vessels – Marine Debris Program
Every state has its own procedures for abandoned vessels, including waiting periods that can range from immediate notification to 30-day holds before any ownership claim can proceed. Moving or claiming the boat yourself can expose you to liability, so let the authorities trace the owner and start the process.