Amazon 3PL and Prep Center Insurance
Your inventory can spend more time at a prep center or 3PL than inside Amazon. The warehouse’s insurance protects the warehouse, so here is how responsibility splits and how sellers close the gap.
Why more Amazon stock now sits at prep centers
Amazon stopped offering FBA prep and item labeling for US shipments on January 1, 2026, so poly-bagging, bubble wrap and barcode labels now have to be done before inventory reaches Amazon. We work with hundreds of Amazon sellers, and since that change many of them have used a prep center or third-party logistics warehouse for the first time. Those buildings hold stock for days or months, often in larger quantities than the seller ever kept at home.
Three things decide who answers for that stock: the law that governs warehouses, the agreement you sign and the insurance on each side. Most sellers learn the details after a loss. This guide walks through them before one, and our Amazon seller insurance hub covers the liability side of the business.
What the law says a warehouse owes you
In most states, Article 7 of the Uniform Commercial Code sets the baseline. A warehouse is liable for loss or damage caused by its failure to use the care a reasonably careful person would use in similar circumstances, and unless the agreement says otherwise it is not liable for damage that such care could not have avoided. A lightning fire, a regional flood or a roof that fails in a storm usually lands on the owner of the goods, not the warehouse.
The same section lets a warehouse limit its damages in the warehouse receipt or storage agreement, by a set amount per article or item or a value per unit of weight. You can ask for a higher limit, in a record, and the warehouse can charge more for it. The one thing it cannot limit is its liability for converting your goods to its own use.
Prep centers sit in a gray area. Some operate as warehouses under formal storage agreements, while others work from a simple service order with a liability clause tucked into their online terms. Either way, find the clause that limits liability before you send the first pallet.
Warehouse legal liability and its limits
Warehouse legal liability insurance is the 3PL’s own coverage for what it owes customers when it is negligent: a forklift through a pallet, a sprinkler head knocked off by careless stacking, cartons shipped to the wrong place. It responds only after negligence is shown, and the burden of showing it usually sits with you. It also follows the contract, so at $0.50 per pound, a cap Red Stag Fulfillment calls the most common, a 20-pound carton of earbuds worth thousands of dollars comes back as ten dollars.
Read the exclusions as well. Warehouse legal liability forms commonly leave out floods and windstorms, and some exclude mysterious disappearance or theft by employees, which is how stock tends to go missing in a busy facility. Ask the 3PL for its certificate of insurance, its limit per loss and per location, and the exclusions that apply to customer goods.
Insuring your own stock at someone else’s address
Because the warehouse’s coverage is fault-based and capped, the inventory itself belongs on your own policy. Most sellers add the 3PL or prep center as a location on their commercial property or inland marine coverage, which Weber Logistics describes as usually the least costly route. Your policy pays you for a covered loss without waiting for anyone to admit fault, and your insurer can then pursue the warehouse for its share.
Give the insurer each address with the peak value you expect there, not the average. Prep centers fill up before Prime Day and the fourth quarter, and a limit set in March can be half of what sits on the racks in November. If values swing widely, ask about a reporting form that adjusts to monthly figures. Stock moving between sites needs transit protection, which our guide to cargo insurance for Amazon sellers explains.
Once units check in at Amazon, its reimbursement policies take over, valued at your sourcing cost for units lost before a customer orders. Amazon Warehousing and Distribution has its own service terms, with claim windows that run from dates Amazon records. Check the current windows in Seller Central and keep receiving records for every shipment.
Contract terms to read before you sign
A prep center agreement is where responsibility is decided, so read it the way an underwriter would. Find the limitation of liability, how it is measured, whether per pound, per unit or per shipment, and whether you can declare a higher value. Then check the standard of care the warehouse accepts, the deadline for reporting a loss, how inventory counts are reconciled and who pays when a labeling or prep error leads Amazon to reject a shipment or charge fees.
Next come the indemnity and insurance clauses. A balanced agreement has the 3PL carry general liability and warehouse legal liability at stated limits, name you as additional insured on its general liability where its insurer allows, and send a fresh certificate every year. Watch for a waiver of subrogation in the warehouse’s favor, because it can stop your insurer from recovering from a negligent warehouse after paying your claim.
Billing terms matter more than they look. Under Article 7, a warehouse holds a lien on stored goods for its charges, including storage, handling and transport, so a dispute over an invoice can freeze inventory you need for a promotion. Agree on how disputed charges are handled, how much notice either side gives to end the agreement, and how quickly stock is released when you move it.
Prep mistakes and your product liability
A prep center’s error can turn into your liability claim. A poly bag missing its suffocation warning, a toy shipped without its choking-hazard label or the wrong instruction sheet in a box all reach the customer under your brand. The injured buyer looks to the seller first, and the product liability policy described on our Amazon seller insurance requirements page is the one that responds for you. Your agreement should give you a right to recover from the prep center, and its general liability should be able to answer for its share.
Tell your insurer which prep centers and 3PLs handle your goods and what they do there: storage only, labeling, kitting or bundling. For a quote, bring the list of addresses with peak values, copies of the storage or service agreements, the warehouses’ certificates and any losses so far. Mithril1 reviews those alongside your Amazon liability, so stock, transit and products are looked at as one picture.
A few useful answers
Common questions
Who is responsible if a prep center loses my inventory?
The prep center, when the loss came from its failure to use reasonable care, and only up to the limit in your agreement. Losses it could not have avoided, and anything above the contract limit, fall to you and your own property coverage.
Is a 3PL's warehouse legal liability enough for my stock?
Seldom. It responds only when the warehouse is at fault, often at a per-pound limit far below the value of consumer goods. List the warehouse as a location on your own policy so the stock is protected whoever caused the loss.
Can I raise the warehouse's liability limit?
Under the Uniform Commercial Code you can ask for a higher limit in a record, and the warehouse can charge a higher rate for it. Compare that charge with the cost of adding the address to your own policy.
What should I ask a prep center for before I send inventory?
Its certificate of insurance showing general liability and warehouse legal liability, the limit per location, the exclusions for customer goods, and a signed agreement with its liability and loss-reporting terms.
Does Amazon reimburse stock lost at my prep center?
No. Amazon’s reimbursement policies apply inside Amazon’s own network. Stock at an outside prep center relies on the prep center’s liability and your own property coverage.