There is no container title for a shipping container in the way there is a title for a car or a house. No U.S. state issues one, and no government office tracks who owns a given intermodal container. Ownership rests on a paper trail you assemble and keep yourself: a bill of sale, the container’s permanent identification markings, and, when available, a manufacturer’s certificate of origin. If you lose those documents, no agency will issue a duplicate.
Why No Title Exists
Shipping containers are treated as commercial equipment, a byproduct of international trade rather than individually titled property. The practical consequence is that the entire burden of proving ownership falls on the buyer. You cannot walk into a DMV equivalent and request a certificate, and you cannot search a public database to confirm who owns a particular box.
The closest thing to a registry is the BIC Code Register, maintained by the Bureau International des Containers. It records the company or individual behind each three-letter owner code stamped on a container. The BIC was appointed by the International Organization for Standardization in 1972 as the global container prefix registry, and customs authorities in many countries use it to verify container operators.1Bureau of International Containers. About the Bureau of International Containers That registry identifies the registered owner or principal operator of a code, not the owner of any specific container. A container can change hands many times without the BIC code ever being updated, which is why your own paperwork carries the weight a title normally would.
Documents That Prove You Own the Container
Treat these the way you would treat a car title. They are the evidence you have.
- Bill of sale. The single most important document. It records who sold the container, who bought it, the price, the date, and the container’s unique identification number. Every purchase should produce a written bill of sale, whether you are buying from a shipping line, a leasing company, or a private seller.
- Manufacturer’s certificate of origin. Issued when a container is first built. It names the manufacturer, the production date, and the container’s identification number. New containers usually ship with one; used containers often do not, since the certificate may have been lost over years of service.
- Lease or charter termination documents. If the container was previously leased, paperwork showing the lease was ended and ownership released to the seller helps establish a clean chain of custody.
A bill of sale does not need to follow a government form. Any written agreement that clearly identifies the container by its full identification number, names both parties, and records the date and price will serve. Keep the original somewhere safe and store a digital copy separately.
The Markings That Identify Your Container
Every intermodal container carries permanent markings that function as its fingerprint. These follow an international standard called ISO 6346 and appear on the doors and at least one side panel. The markings on the container should match the identification number on your bill of sale exactly. When they don’t, something is wrong.
The Container Identification Number
The identification number has four parts. The first three capital letters are the owner code, identifying the registered owner or operator. The fourth letter is an equipment category identifier: “U” for a freight container, “J” for detachable equipment like a generator, or “Z” for a chassis. Then comes a six-digit serial number unique to that owner’s fleet, and finally a single check digit used to verify the rest of the sequence is accurate.1Bureau of International Containers. About the Bureau of International Containers A container marked CBHU 344556 3, for example, belongs to the operator with code CBH, is a freight container (U), carries serial number 344556, and has a check digit of 3.
The CSC Safety Approval Plate
Any container used in international transport must carry a CSC safety approval plate, a permanent fireproof and corrosion-resistant metal plate conforming to the International Convention for Safe Containers. It records the country of approval, an approval reference number, the month and year the container was manufactured, the manufacturer’s identification number, the maximum payload in both kilograms and pounds, and stacking and racking test load values.2Bureau International des Containers. The Container CSC Combined Data Plate Explained The plate also shows either a next examination date under a periodic examination scheme or a continuous examination program number. On a used container, check the plate carefully. If the next inspection date has passed and the container has not been re-examined, it cannot legally be used for international shipping.
Below the identification number you will also see a four-character size and type code and the container’s maximum gross weight, tare weight, and maximum payload in kilograms and pounds. These numbers should match what the seller claims about the container.
What to Verify Before You Pay
The most common mistake buyers make is paying cash, getting a handshake, and walking away with nothing in writing. That works fine until someone disputes ownership or the container turns out to carry a lien.
Confirm that the identification number on the doors matches the number on the bill of sale and the CSC plate. A mismatch can mean the container was repainted or that the paperwork belongs to a different unit. Ask the seller for any prior bills of sale, lease termination documents, or manufacturer’s certificates. A chain of documents going back to the original manufacturer or shipping line is ideal, though rarely available for older containers. Photograph every marking on the container, including the identification number, size and type code, weight markings, and CSC plate, before you take delivery. Those photos become backup evidence if your paper documents are ever lost.
Checking for Liens Before You Buy
A shipping container is personal property, and lenders can place a lien on it just like any other piece of equipment. If the previous owner pledged the container as collateral for a loan and never paid it off, the lender’s security interest may follow the container to you. The lender could legally repossess it regardless of what you paid.
Lenders record these security interests by filing a UCC-1 financing statement with the secretary of state’s office in the state where the debtor is organized (for businesses) or resides (for individuals). That filing creates a public record. Before buying any container, especially from a private party or a small reseller, run a UCC lien search against the seller’s name through the secretary of state in the seller’s home state. Many states offer online search portals. Search using the seller’s exact legal name, any former business names, and any trade names, so nothing slips through.
If a search turns up an active UCC filing that lists equipment, containers, or general collateral, ask the seller to provide a lien release from the creditor before you close. Walking away from a container with an unresolved lien is almost always cheaper than fighting for it later.
Transferring Ownership
Transferring a container is simpler than transferring titled property because there is no government office to notify. The seller writes a bill of sale to the buyer, and the buyer keeps it. A sloppy transfer still creates problems later, so get the details right.
The bill of sale should include the full container identification number (owner code, equipment category letter, serial number, and check digit), the names and addresses of both seller and buyer, the date, and the price. If the seller has any prior ownership documents, ask for those too. They are not strictly required, but they strengthen your claim.
Most buyers do not need to think about the BIC code. Registration is designed for companies operating fleets in international commerce, and it carries its own fees and annual renewal costs. If you are buying one or two containers for storage, a workshop, or a building project, the existing markings stay as they are and your bill of sale is sufficient proof of ownership. If you plan to operate containers in international trade under your own identity, you will need your own BIC code and the markings on the container should be updated to reflect it.
When the Container Stops Being Personal Property
A shipping container sitting on your land as portable storage is personal property, and the paperwork above governs it. Once you permanently attach it to a foundation, run plumbing and electrical through it, and use it as a home or commercial building, its legal classification can shift to real property. That changes how ownership works.
Converting a container into a habitable structure typically requires a building permit and compliance with local building codes, including site plans, architectural drawings, and engineering reports showing the modified container meets structural, fire safety, and energy requirements. Once the container is permanently affixed to real property, ownership transfers with the land through a deed rather than a bill of sale. Any existing UCC lien on the container as personal property may need to be addressed through a fixture filing with the county land records office where the property sits, since the container is no longer standalone equipment. Sort out ownership paperwork and lien status before the container is bolted to a foundation. Untangling those issues after it becomes part of the real estate is significantly harder.