Certificates of Insurance: What a COI Proves and What It Doesn't

A certificate of insurance, or COI, is a one-page snapshot showing that specific insurance policies existed on the day the certificate was issued. It is evidence, not a contract: it gives the holder no coverage rights, does not change the underlying policy, and the fine print on the form says exactly that. Everything a COI appears to promise actually lives in the policy and its endorsements, which is why knowing how to read one is worth ten minutes of your time.

What is a certificate of insurance?

A certificate of insurance is a standardized summary, usually issued on the ACORD 25 form, that lists a business's insurance policies along with the carriers, policy numbers, effective dates, and limits. The insured's broker issues it at the insured's request and sends it to a third party, called the certificate holder, who wants confirmation that coverage exists.

Most certificates summarize the core commercial lines: general liability, commercial auto, workers' compensation, and umbrella or excess liability. If you hire subcontractors, lease space, or sell to larger companies, certificates flow in both directions constantly.

What does a COI actually prove?

A COI proves one thing: the listed policies were in force on the date the certificate was issued. It does not prove the policies will stay in force, that they cover your specific project or claim, or that you have any rights under them.

The form is explicit about its own limits. The standard certificate states that it is issued as a matter of information only, confers no rights on the certificate holder, and does not amend, extend, or alter the coverage afforded by the policies it lists.

In practice, that means three things:

• A certificate can go stale immediately. A policy can be canceled or endorsed the day after the certificate is issued, and the holder may never hear about it.
• The summary is not the coverage. Exclusions, conditions, and sublimits live in the policy forms, none of which appear on the certificate.
• Words typed in the description box carry no weight on their own. A sentence added to a certificate cannot grant status or coverage the policy itself does not provide.

Why do clients, general contractors, and landlords ask for COIs?

They ask because a certificate is the fastest practical way to confirm you carry the insurance your contract requires before work starts, a lease begins, or a vendor agreement goes live. The requirement is about risk transfer: they want your insurance, not theirs, to respond if your work causes a loss.

• General contractors collect certificates from subcontractors so a sub's jobsite accident is meant to land on the sub's policies. On construction projects, missing sub certificates can also mean the GC pays for uninsured subs at its own workers' comp and liability audits.
• Landlords want confirmation that a tenant carries liability coverage, and usually want to be added to it, before handing over keys.
• Enterprise clients verify that vendors and consultants meet the insurance section of the master services agreement before issuing a purchase order.

What should you check when you receive a COI?

Check five things: the named insured, the policy dates, the limits, the endorsements actually attached, and the strength of the carriers listed. A certificate that fails any one of these may not satisfy your contract.

1. Named insured. The name on the certificate should match the entity you contracted with. A certificate for a parent company or an affiliate does not confirm coverage for the subsidiary doing your work.
2. Dates. The policy periods should cover your project or lease term. A certificate issued in March tells you nothing about July, so track expirations and collect updated certificates at every renewal.
3. Limits. Compare each line to the contract requirement, including any required umbrella or excess layer. A typical general liability structure is $1 million per occurrence and $2 million aggregate, but many contracts require more.
4. Endorsements. If your contract requires additional insured status, a waiver of subrogation, or primary and noncontributory wording, ask for copies of the endorsements themselves. A checked box or typed sentence is not the endorsement.
5. Carrier quality. Many contracts require carriers with a strong financial strength rating. A certificate listing an unrated or thinly capitalized insurer may technically show coverage while failing the contract.

Why does "additional insured" on the certificate mean nothing by itself?

Because additional insured status is created by a policy endorsement, not by the certificate. If the policy has no additional insured endorsement, the sentence typed on the certificate has no legal effect, and the certificate's own disclaimer says as much.

When your contract requires additional insured status, ask for the endorsement itself. Two forms are common:

• Blanket endorsements typically extend additional insured status to any party the named insured has agreed, in a written contract, to add. If you rely on one, confirm your written contract actually contains that requirement.
• Scheduled endorsements name specific parties. If you rely on one, confirm your exact legal name appears on the schedule.

Scope matters too. Many additional insured endorsements cover only ongoing operations, not completed work, and only for liability arising out of the named insured's acts. If your contract calls for completed operations coverage, that usually requires a separate or broader endorsement, and it is worth confirming rather than assuming.

What if you're the one providing the certificate?

Send the request to your broker with the contract's insurance requirements attached, ideally before you sign. Your broker can only certify what your policies actually do, so surprises are cheaper to fix during negotiation than after.

• Flag unusual wording early. Requirements like completed operations additional insured status, a waiver of subrogation on workers' comp, or direct cancellation notice to the holder may require endorsements, and some endorsements carry added premium.
• Never edit a certificate yourself. Altering a certificate, or asking for wording your policy does not support, misrepresents your coverage, and that exposure lands on you.
• Build a standing process. Keep a list of active certificate holders so every one of them receives an updated certificate at renewal without a scramble.

Where a broker fits in

Certificates sit at the junction of your contracts and your policies, and mismatches between the two are where uncovered claims come from. Velora Risk Partners reviews contract insurance requirements, confirms the endorsements behind each certificate, and handles issuance so requests don't slow your work down. If certificates are piling up, or you're not sure what's actually behind the ones you're collecting, reach out and we'll take a look together.

Frequently asked questions

Who issues a certificate of insurance?

The insured's insurance broker or agent issues the certificate on the insured's behalf; certificate holders request it from the insured, not from the carrier. Standard certificates are usually turned around quickly. Requests involving special wording, such as additional insured status or a waiver of subrogation, can take longer because the broker may need to confirm or add an endorsement to the policy before certifying it.

Is a COI the same as proof of insurance coverage?

A certificate of insurance is evidence that the listed policies were in force on the day the certificate was issued, which is narrower than proof of coverage. Whether a specific claim is covered depends on the policy forms, endorsements, exclusions, and limits, none of which appear on the certificate. If you need certainty about a specific exposure, review the policy language rather than the summary.

What is the ACORD 25 form?

ACORD 25 is the standard certificate of liability insurance used across the U.S. insurance industry. It summarizes general liability, auto liability, umbrella, and workers' compensation policies on a single page, including carriers, policy numbers, dates, and limits. Its printed disclaimer states that the certificate is informational only, confers no rights on the holder, and does not amend the policies it describes.

Will I be notified if a vendor's policy is canceled?

Certificate holders usually receive no automatic notice. The standard certificate says cancellation notice will be delivered in accordance with the policy provisions, and most policies promise notice only to the named insured, not to certificate holders. If cancellation notice matters to you, require a notice-of-cancellation endorsement in your contract and ask for a copy, or track policy expiration dates and request updated certificates at each renewal.

What does primary and noncontributory mean on a certificate?

Primary and noncontributory wording means the named insured's policy is intended to pay first, without asking the additional insured's own insurance to contribute. Contracts often require it so the party causing a loss absorbs it through its own insurance program. Like additional insured status, it is only real if a policy endorsement provides it; the phrase typed on a certificate does not create the obligation by itself.

How long is a certificate of insurance valid?

A certificate has no term of its own. It reflects the policies as they existed on the day of issue, and most commercial policies run for twelve months. Because policies can cancel or change mid-term, treat any certificate as a dated snapshot: collect a fresh one at each policy renewal, and sooner if the relationship or the contract changes materially.