Certificate of Insurance, Bailee Coverage and Stock Throughput

By Bernardo Campelo, Forbes Business Council E-Commerce Leader, Amazon SPN Certified provider, Amazon SP-API authorized partner, and Founder of PrepVia.

In August 2026, two large buyers posted the same discovery in a seller forum thread, four days apart. Both had filed a claim after inventory was damaged inside a third party prep center. Both were told, in almost identical language, that the loss exceeded what the prep center policy actually paid for goods it did not own. Neither buyer had read the certificate of insurance closely enough to know that before the claim.

The story spread the way operational lessons spread on Amazon seller forums: fast, and mostly among people who had never thought to ask the question. Within weeks, certificate of insurance and bailee coverage started showing up as line items on 3PL request for proposal templates, next to prep window and per unit pricing. That shift is overdue. A warehouse full of someone else’s inventory carries real financial exposure, and the insurance question decides who absorbs a loss when something goes wrong.

This is not a legal or insurance opinion. It is the mechanism explained in plain terms: what a 3PL general liability policy covers, what bailee coverage is, what stock throughput insurance is, what a certificate of insurance proves and does not prove, and the two ways to get named on a policy so a payout actually reaches you.

What a 3PL’s General Liability Policy Actually Covers

Every legitimate prep center carries commercial general liability insurance, and most will hand over a certificate on request. Sellers often read that certificate and relax, assuming it means their inventory is covered inside that building. In most cases it does not mean that at all.

Commercial general liability protects the warehouse operator against claims brought by third parties: a visitor who slips on the floor, a delivery driver injured on the loading dock, damage the business causes to a neighboring property. It answers the question of who pays when the warehouse hurts someone or something outside its own four walls. It was never built to answer the question a seller actually cares about, which is what happens when a pallet of the seller’s own product is dropped, flooded or stolen while it sits inside that warehouse.

That distinction is the root of the August 2026 forum thread. Each buyer had a certificate of insurance in hand, confirmed the policy was active, and still discovered after the claim that the coverage in question did not extend to the value of goods owned by a client. The certificate was real. The assumption built on top of it was not.

Bailee Coverage: The Policy the 3PL Buys for Goods It Does Not Own

Bailee coverage, sometimes called warehouse legal liability, is the policy built for exactly this situation. A bailee is a party that holds property belonging to someone else, which describes a prep center holding a client’s inventory with precision. Bailee coverage responds when the bailee is legally liable for loss or damage to that property, typically because the bailee failed to exercise reasonable care.

Two words in that sentence matter more than the rest of the clause: legally liable. Bailee coverage generally pays when the prep center did something wrong: mishandling, negligent storage, a fire caused by faulty wiring the operator should have fixed. It typically does not pay for a shipment lost in transit before it reached the dock, damage the warehouse could not reasonably have prevented, or a loss with no clear cause. Reading the fault standard in the policy, not just the coverage line, is the difference between a claim that pays and one that gets denied on a technicality.

Bailee policies almost always carry a cap, expressed per pound, per package or per occurrence, and a deductible the prep center absorbs before the insurer pays a cent. A cap set for a typical client’s average shipment value can fall far short of what a single high value pallet is worth. Declaring a higher value, when the policy allows it, raises the cap. Silence does not.

Stock Throughput Insurance: The Policy You Buy as the Owner

Stock throughput insurance flips the ownership of the risk. Where bailee coverage is bought by the 3PL to cover its own legal liability, stock throughput is bought by the owner of the goods, meaning you, to cover the goods themselves regardless of whose fault a loss turns out to be.

A stock throughput policy is built to follow the product, not the building. Coverage typically starts at the supplier, continues through ocean or air freight, covers the goods while they sit in a prep center or any other storage point, and continues through the final domestic leg to the fulfillment center or another destination. It combines what used to be three separate policies, marine cargo, inland transit and warehouse storage, into one continuous line, which matters because loss often happens at the seam between two legs where neither party wants to take responsibility.

The practical case for stock throughput is simple. It does not require proving the 3PL was negligent. It pays based on the value of the goods and the terms of your own policy, which puts you in control of the limit instead of relying on a cap the 3PL set for its own protection. For a wholesaler or brand moving high volume through a prep center, that difference in who controls the limit is often the entire point.

Three Policies, Three Owners, One Table

Sellers frequently conflate these three coverages because all three can appear on the same certificate of insurance, issued by the same broker, for the same warehouse. They protect three different interests, and confusing them is exactly how the August 2026 forum discovery happened.

Ask which of these three a prep center’s certificate actually documents, in writing, before assuming the answer is all three.

The Certificate of Insurance: What It Proves and What It Does Not

A certificate of insurance is a summary document an insurer or broker issues, confirming that a policy exists, naming the carrier, the policy number, the effective dates and the coverage types in force on the date it was issued. It is useful. It is also frequently misread.

What a Certificate Proves

A certificate proves that a named policy was active on the date of issue, with the limits and coverage types listed on the form. It gives you a carrier name and policy number to verify directly with the insurer if you choose to call. It is the standard document requested in a 3PL RFP, and requesting one before signing is reasonable due diligence, one of the questions we recommend in our prep center agreement checklist.

What a Certificate Does Not Prove

A certificate does not guarantee the policy will still be active when you actually have a claim, since policies lapse and non-renew. It does not mean you are covered under that policy unless you are named on it. It does not disclose every exclusion buried in the full policy language, since a certificate is a summary, not the contract itself. And a policy limit stated on a certificate is a ceiling shared across every client in the building, not a number reserved for your goods alone.

This is not insurance advice, and nothing here replaces a conversation with a licensed broker. The specific limits, exclusions and endorsements that apply to your inventory are a conversation to have with your own insurance broker, not with a prep center’s sales team, before you sign anything or move volume.

Additional Insured or Loss Payee: The Two Ways to Get Named

A certificate with your company printed as the client of record does not put you on the policy. Getting an actual right to a payout usually means asking to be added to the policy in one of two ways, and the two are not interchangeable.

Additional Insured

Additional insured status extends certain protections of the policy to you as a party, most often relevant on the liability side. It can matter if a third party sues over something connected to your goods and you want the 3PL’s liability policy to respond on your behalf as well as theirs. It is a status commonly requested in commercial contracts generally, and it is worth asking for, though on its own it does not automatically make you the party who receives a check for damaged inventory.

Loss Payee

Loss payee status is the one that matters for a damaged or lost shipment. Being named as loss payee on a property or bailee policy means that if a covered loss occurs, the insurer pays you directly, or pays you and the 3PL jointly, instead of paying the 3PL alone and leaving you to collect from them afterward. For inventory sitting in someone else’s warehouse, loss payee status is the closer match to what a seller actually wants.

Ask a prep center directly whether it will add you as an additional insured, a loss payee, or both, and ask for the endorsement in writing rather than a verbal yes. A prep center that has handled this before will recognize both terms immediately and know which one applies to your situation.

Why This Became a Line Item on Every 3PL RFP

Large buyers write request for proposal documents to reduce exactly the kind of surprise the two forum posts described. Once how our inventory is insured while it sits in your building became a known gap rather than an assumed given, it moved from a follow-up question to a required field on the intake form, next to prep window, per unit pricing and SLA remedy. Large wholesalers and distributors, the profile our wholesale and distribution page speaks to directly, are often the accounts now writing insurance language into every RFP they send.

That shift is a reasonable response to a real gap, not paperwork for its own sake. A brand or wholesaler moving meaningful volume through a prep center is exposed to a loss large enough to matter to the business, and the certificate alone does not answer whether that specific exposure is covered. Building the insurance question into procurement, alongside the questions in our prep center agreement checklist, our guide to prep center red flags, and the remedy language in our own SLA guarantee, puts the answer on record before volume moves, not after a claim.

PrepVia is Amazon SPN Certified, one of only 63 providers in that directory, and operates a 5,500 square foot facility with three loading docks in Miami. Certification and facility size do not substitute for reading a certificate of insurance closely. They are the kind of operational detail worth confirming alongside it, and the kind of detail we publish on our company facts page for exactly this reason, so an RFP does not have to start from a blank page.

The Questions to Ask Before You Move Volume

Frequently Asked Questions

Does a 3PL’s general liability insurance cover my inventory?

Almost never on its own. Commercial general liability protects the warehouse against claims from third parties for injury or property damage the business causes, and it does not pay to replace a client’s damaged or lost goods. The policy built to cover a client’s inventory while it sits in a 3PL’s care is bailee coverage, sometimes called warehouse legal liability, and it is a separate line on the insurance program, not an automatic extension of general liability.

What is bailee coverage and does every prep center carry it?

Bailee coverage, or warehouse legal liability, is the policy a 3PL buys to cover its legal liability for loss or damage to goods owned by clients and held in its care, typically when the loss traces back to the 3PL’s own negligence. Not every operator carries it, and among those that do, the cap and the fault standard vary widely. Ask for the policy by name rather than assuming a general certificate of insurance includes it.

What is stock throughput insurance and who should buy it?

Stock throughput insurance is a single policy the owner of the goods buys to cover inventory continuously from the supplier through ocean or air freight, through any warehouse or prep center stop, to the final destination. It is worth pricing once your inventory value at any single point, including a pallet sitting inside a prep center, exceeds what a 3PL’s bailee coverage would actually pay out after its cap and deductible.

What does a certificate of insurance actually prove?

A certificate of insurance confirms that a named policy, carrier, policy number and set of coverage types were active on the date the certificate was issued. It does not guarantee the policy will still be active later, does not disclose every exclusion in the full policy, and does not mean you personally have a right to a payout unless you are named on the policy as an additional insured or a loss payee.

What is the difference between additional insured and loss payee?

Additional insured status extends certain protections of a policy, most relevant on the liability side, to a party beyond the original policyholder. Loss payee status means the insurer pays that party directly, or jointly with the policyholder, when a covered property loss occurs. For inventory damaged or lost inside a 3PL’s warehouse, loss payee status is the one that determines whether a check reaches you.

How much of my inventory value does bailee coverage typically cover?

It depends entirely on the cap the 3PL’s policy carries, which is usually expressed per pound, per package or per occurrence rather than as a flat dollar figure tied to your specific goods. That cap is set for the operator’s overall book of business, not for any single client’s shipment, so a high value pallet can exceed it even when the policy itself is real and active. Ask for the cap in writing and compare it against your own declared value.

Should I ask my 3PL to raise its bailee limit or buy my own stock throughput policy?

Both are worth exploring, and they are not mutually exclusive. Asking to be named loss payee and asking whether the cap can be raised for declared high value shipments costs nothing and closes part of the gap. A stock throughput policy costs money but puts the coverage limit, the claim process and the payout entirely under your control, which matters most once your inventory value at a given prep center regularly exceeds the bailee cap.

Final Take

None of this is a reason to distrust a prep center that operates in good faith. It is a reason to stop treating a certificate of insurance as a document you file away unread. The two buyers who posted their discovery in a forum thread in August 2026 had done more diligence than most sellers do. They had a certificate. They confirmed the policy was active. What they had not done was confirm which specific coverage responded to a claim on their own goods, and that single gap is what turned a warehouse accident into an uninsured loss.

The mechanism is not complicated once it is named. General liability protects the warehouse from the outside world. Bailee coverage protects the warehouse from its own mistakes with your goods, up to a cap it set. Stock throughput protects your goods on your own terms, from the supplier to wherever they end up, regardless of fault. A certificate proves a policy exists. Being named as additional insured or loss payee is what turns that policy into your protection.

This is not a substitute for a conversation with your own insurance broker, and it should not be treated as one. It is the vocabulary that makes that conversation productive, and the list of questions that belongs on every 3PL RFP next to prep window and per unit pricing.

We keep our own certificate of insurance available on request, alongside the facility details and certification record on our facts page, because an RFP moves faster when the paperwork is ready before the question is asked.