Certificates of Insurance: What to Ask Your Carrier For and Why

Before a new carrier’s truck backs into your dock for the first time, one piece of paper answers a question you should never leave open: if something goes wrong, is there an insurer behind this company? That paper is the certificate of insurance — the COI — and requesting one is among the most normal things a shipper can do. Every serious carrier gets asked constantly and has the document ready.

This post explains what a COI is, the coverage lines that matter in freight, how to actually read one, and where its limits are. It’s education, not insurance advice — coverage questions about your specific freight belong with the carrier and your own broker. And to be clear about our lane: this post describes what shippers should ask any carrier for. It’s the same standard we expect to be held to.

A COI is evidence, not a policy

A certificate of insurance is a one-page summary, issued by an insurance broker or insurer, stating that named policies exist: who’s insured, which insurer stands behind each policy, policy numbers, effective and expiry dates, and limits. Its whole job is to let a third party — you — verify that coverage was in force without reading the policies themselves.

Understand what it isn’t. A COI doesn’t change coverage, doesn’t make you an insured party by itself, and doesn’t promise that any particular claim will be paid — that’s decided by policy wording, exclusions and the facts of a loss. Think of it the way you’d think of a receipt: strong evidence something exists, silent on the fine print. Our answer page on what a certificate of insurance is condenses this into a quick reference.

The coverage lines that matter in freight

A carrier’s COI typically evidences a few distinct policies, and each answers a different “what if”:

Coverage line	What it responds to
Commercial general liability (CGL)	Injury or property damage arising from the business’s operations — the forklift incident at your dock, damage at a customer’s premises
Automobile liability	Third-party injury and damage arising from vehicle operation — the collision risk that comes with trucks on the road
Cargo insurance	Loss of or damage to the freight in the carrier’s care, subject to the policy’s terms and exclusions

For a shipper, all three matter, but cargo coverage is the line that most directly concerns your goods. When you look at it, look past the headline limit: per-occurrence limits, the distinction between one shipment and everything on the truck, and commodity exclusions all shape what the number really means for your freight. The fuller checklist lives in our answer on what insurance a carrier should have.

How to read the certificate in five minutes

You don’t need an insurance background to get real value from a COI. Check five things:

1. The named insured matches the company you’re hiring. Exactly — legal name, not just a similar trade name. If you’re quoted by one entity and insured paper shows another, ask why before freight moves.
2. The policy dates bracket your shipping activity. Certificates evidence coverage up to the expiry dates shown. A certificate from last year proves last year.
3. The limits are plausible for your freight. A cargo limit that wouldn’t cover one of your typical shipments is a conversation to have now, not after a loss.
4. You’re the certificate holder. Being named as holder ties the document to you and is standard practice in vendor onboarding.
5. The broker’s contact details are real. The issuing brokerage is who can verify the certificate if anything looks off — and verification calls are routine.

Anything unclear, ask. Carriers with nothing to hide answer insurance questions easily, and the ones that bristle at them are making your vetting decision for you — a theme we expand in why carrier compliance should matter to shippers.

Cargo insurance is not the same as carrier liability

Here’s the nuance that catches shippers: the carrier’s legal liability for freight loss and the carrier’s cargo insurance are related but different things. Standard contract-of-carriage terms commonly limit a carrier’s liability to an amount calculated per unit of weight unless a higher value is declared before shipping — which means that for dense, high-value freight, the default liability figure can be far below the invoice value of the goods.

Cargo insurance sits behind the carrier’s liability; it doesn’t automatically expand it. So for valuable shipments the practical questions are: what liability applies to this shipment under the terms we’re shipping on, should a higher value be declared, and does anything need to be arranged on my own insurance side? Those questions have real answers — our page on whether freight is insured in transit walks through them — and the time to ask is before pickup.

Make the COI part of onboarding, not an afterthought

The COI works best as one document in a small standing package you collect from any new carrier: certificate of insurance, CVOR details and safety record, and in Ontario a WSIB clearance certificate. Together they take under an hour to gather and verify, and they answer the three background questions that matter: is this company insured, is it safe on the road, and is it in good standing as an employer.

One more onboarding question belongs beside the COI: whose insurance applies if the work is ever subcontracted? Some carriers hand freight to partner companies or owner-operators, and the certificate you collected covers the company you hired — not necessarily the company that shows up. If subcontracting is possible, ask how it’s disclosed and documented, so the paper on file always matches the truck at the dock.

Then keep it current. Policies renew annually; a stale certificate is a quiet gap. A calendar reminder at policy expiry — or simply requesting updated paper each year — keeps the file meaningful. None of this is bureaucracy for its own sake: on the day something goes wrong, the difference between a documented carrier and an undocumented one is the difference between a claims process and a dead end.

The takeaway

Ask every carrier for a certificate of insurance before the first shipment, read the five basics — named insured, dates, limits, holder, broker — and understand that the COI evidences coverage rather than promising payment. Pair it with the liability conversation for anything valuable, and refresh it at renewal.

At Sonic Transport we run strictly B2B freight across the GTA, Golden Horseshoe and Southern Ontario, and we consider documentation questions a normal part of starting a shipping relationship — on same-day direct work especially, trust is the product. If you’re lining up a carrier for regular freight, tell us what you ship and a real person will take it from there, paperwork included.