A certificate holder receives a copy of a certificate of insurance and nothing else, the status is purely informational and grants no rights under the policy. An additional insured is added to the policy itself by endorsement and gains actual coverage, including defense and access to the named insured's limits for claims arising out of that insured's work. If a relationship is risky enough that you want proof of insurance, it is usually risky enough that you should require additional insured status too.
The two terms travel together on almost every construction contract and commercial lease, which is exactly why they get confused. One is a mailing address on a form. The other is an insurance relationship. This guide compares them side by side, if you first need the basics of how certificates work, start with our certificate of insurance guide.
Certificate Holder
A certificate holder is the person or business named in the bottom corner of a certificate of insurance as the party receiving it. The designation is informational only and gives the holder no coverage, no defense, and no rights under the policy.
What does a certificate holder get?
A certificate holder gets a document. When a landlord or general contractor asks to be listed as certificate holder, the named insured's broker issues an ACORD 25 certificate showing the carriers, policy numbers, coverage types, limits, and effective dates, with the holder's name and address in the designated box. That tells the holder that coverage existed on the day the certificate was issued, which is genuinely useful for vetting tenants, subcontractors, and vendors.
It ends there. The ACORD 25 itself states on its face that the certificate is issued as a matter of information only and confers no rights upon the certificate holder. The holder cannot file a claim under the policy, cannot demand a defense, and cannot enforce the policy's terms. If the policy cancels the day after issuance, the certificate does not change that.
One practical detail matters here. Give the exact legal entity name and address when you ask to be a certificate holder, because that same name usually flows into any endorsement schedule later, and a claim adjuster will read the entity name literally.
What does an additional insured get?
An additional insured has actual rights under someone else's policy because the policy itself was amended to include them. On a commercial general liability policy that happens through an additional insured endorsement, most commonly CG 20 10 for ongoing operations, scheduled by name or granted blanket to anyone the contract requires. The status delivers benefits no certificate can:
- A defense paid by the other party's insurer: defense costs are supplementary payments outside the limits under the standard CGL, so a covered lawsuit gets defended without eroding your own coverage
- Access to the named insured's limits: their policy responds to the claim before yours has to, especially when paired with primary and noncontributory wording
- Protection from subrogation: carriers generally do not pursue recovery against their own insureds
- A backup when contractual indemnity fails: if a state anti-indemnity statute voids the hold harmless clause, additional insured status can still respond
The coverage is not unlimited. Endorsements like CG 20 10 apply only to liability arising out of the named insured's work for you, and the ongoing operations wording stops at project completion. Contracts that need completed operations protection should also require CG 20 37. Our guide to additional insured endorsements walks through the full family of forms.
How do certificate holders and additional insureds compare?
The short version is that a certificate holder gets visibility and an additional insured gets protection, and everything else flows from that. Here is the side by side comparison:
| Certificate holder | Additional insured | |
|---|---|---|
| Rights under the policy | None. Informational only, no claim rights, no defense | Actual coverage. Defense and indemnity for claims arising from the named insured's work |
| What it costs the named insured | Nothing, issuing a certificate is routine broker service | Possible premium charge for scheduled endorsements, blanket wording is often already built into contractor policies |
| Paperwork required | ACORD 25 certificate listing your name and address | Policy endorsement (scheduled or blanket) plus a certificate that reflects it |
| When to require it | Low-risk verification, confirming a vendor or tenant carries coverage at all | Any relationship where their work could get you sued, construction contracts, leases, equipment rentals |
Notice that the two are not alternatives in practice. A party that requires additional insured status is still listed as certificate holder so it receives the certificate documenting the endorsement. You hold both roles at once.
How do you upgrade from certificate holder to additional insured?
The upgrade is a policy change, so it runs through the named insured and their broker rather than through you. The sequence matters:
Put the requirement in the written contract
Additional insured endorsements, especially blanket ones, are typically triggered by a written contract executed before the work begins or the loss occurs. A handshake agreement or an email after the injury is too late. Spell out the status, the forms or equivalent wording you expect, and any primary and noncontributory requirement.
Have the named insured request the endorsement from their broker
The broker either confirms an existing blanket endorsement picks you up or orders a scheduled endorsement naming your exact legal entity. This is the step that actually creates coverage, and it can involve underwriting and a premium charge.
Collect the endorsement, not just the certificate
Ask for a copy of the endorsement itself or the policy's blanket wording. Read the schedule and confirm your entity name matches. A certificate stating you are an additional insured is a claim about the policy, the endorsement is the proof.
Diary the expiration date and re-verify at renewal
Endorsements live and die with the policy term. Request updated certificates and endorsement copies each year the relationship continues.
The whole process usually takes days, not weeks, for a business with a responsive broker. Start it before you sign.
What contract mistakes should you avoid?
Most disputes over these two terms trace back to a handful of repeatable drafting and follow-through errors. Watch for these:
- Asking only for a certificate when you needed the endorsement: a contract that says "provide a certificate of insurance" gets you paper. Say "name us as additional insured on the CGL by endorsement" and specify completed operations where relevant.
- Accepting a certificate that overstates the policy: certificates sometimes claim additional insured status no endorsement supports. That version protects no one and creates errors and omissions exposure for the issuing agency.
- Getting ongoing operations coverage when the risk is completed work: CG 20 10 stops at completion. Construction defect claims arrive years later, which is what CG 20 37 exists for.
- Ignoring the entity name: an endorsement scheduling "Smith Properties LLC" does not clearly cover "Smith Properties Management Inc." List every entity that could be sued.
- Confusing additional insured with named insured: an additional insured gets coverage for liability tied to the named insured's work, not for its own independent operations. Your own policy still does that job.
- Requiring the status and never verifying it: collect the endorsement up front and again at each renewal, since a midterm cancellation or nonrenewal can quietly end your protection.
Frequently asked questions
Does being a certificate holder give me any insurance coverage?
No. A certificate holder only receives the certificate of insurance as evidence that coverage existed on the issue date. The ACORD 25 states that it confers no rights on the holder. To have defense or indemnity under the policy, you need to be an insured, which for a third party means an additional insured endorsement on the policy itself.
How much does it cost to add an additional insured?
It depends on the policy. Many contractor CGL policies already carry blanket additional insured wording that applies automatically when a written contract requires the status, at no per-request charge. Scheduled endorsements naming a specific entity may carry a premium charge set by the carrier. Either way the cost falls on the named insured whose policy is being endorsed.
Can I be both a certificate holder and an additional insured?
Yes, and in practice you usually are. The endorsement makes you an additional insured on the policy, and the certificate listing you as holder documents that fact so you have evidence in your file. Treat the certificate as the receipt and the endorsement as the purchase.
What endorsement makes someone an additional insured on a general liability policy?
The most common is CG 20 10, which covers a scheduled person or organization for liability arising out of the named insured's ongoing operations. CG 20 37 adds completed operations. Carriers also offer blanket endorsements that grant the status to any party a written contract requires, without naming each one on a schedule.
This guide is for educational purposes and summarizes standard ISO policy language. Your policy's specific terms, conditions, and endorsements control. Talk to a licensed broker about your actual exposures.