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A certificate of insurance (COI) is a standardized one-page document, most often the ACORD 25 form, issued by an insurer or licensed broker to confirm that a party holds active insurance coverage. It summarizes the policies in force, including the types of coverage, the limits, the policy numbers, and the effective and expiration dates. In commercial real estate, the COI is the standard proof a property team uses to verify that tenants and vendors carry the insurance their agreements require.
What a certificate of insurance means
A certificate of insurance is best understood as a summary, not the policy itself. The actual insurance policy is a lengthy contract between an insurer and the insured party. The COI distills the essentials of that policy onto a single standardized page so that a third party, such as a landlord, can quickly confirm that valid coverage exists without reading the entire contract.
The most common format is the ACORD 25, a standardized certificate of liability insurance form produced by ACORD, an organization that develops standard insurance industry forms. Because the layout is consistent, recipients across industries can read a COI quickly and find the same information in the same place every time. That standardization is precisely what makes the document so useful at scale.
It is important to understand what a COI does and does not do. It provides evidence that coverage was in place as of the date it was issued, and it identifies the policies, limits, and dates. It does not by itself amend the policy or guarantee that coverage will remain active. That is why property teams not only collect COIs but also track their expiration dates and confirm specific requirements, such as additional insured status, are actually reflected in the underlying policy.
Why certificates of insurance matter in commercial real estate
The central reason is risk transfer. A commercial property hosts constant activity by parties other than the owner: tenants operating their businesses and vendors performing repairs, cleaning, construction, and inspections. If one of those parties causes injury or property damage, the owner wants the responsible party's insurance to respond, not their own. The COI is the proof that such coverage exists before anyone sets foot on the property.
For vendors in particular, requiring a current COI is a basic safeguard. A contractor working on a roof, a mechanical system, or an elevator introduces real risk. Confirming that the contractor carries adequate liability coverage, and that the owner is named as an additional insured, ensures that protection is in place if something goes wrong. Allowing uninsured work on a property can expose the owner to significant liability.
For tenants, COIs verify that lease insurance requirements are met throughout the term. A lease typically obligates the tenant to maintain certain coverage, and the COI is how the landlord confirms compliance, both at move-in and at each renewal. Because policies expire and coverage can lapse, tracking COIs is an ongoing responsibility rather than a one-time check. Doing it well protects the owner continuously and supports clean insurance, lending, and audit records.
The cost of getting this wrong can be substantial. If a vendor without valid coverage causes an injury or damages property, the claim may fall back on the owner's own insurance, raising premiums and exposing the owner to losses that should have been someone else's responsibility. If a certificate was collected once but allowed to expire, the protection it represented may no longer exist at the moment it is needed. This is why experienced property teams treat COI management as an active discipline. The certificate is only as valuable as the team's confidence that the coverage behind it is current, complete, and correctly structured, and that confidence comes from consistent tracking rather than a single document on file.
What landlords verify on a COI
When a property team reviews a certificate, the goal is to confirm that the coverage on the page actually matches what the lease or vendor agreement demands. Several specific checks come up again and again. The named insured should match the legal entity that signed the contract, so a certificate issued to a parent company or an affiliate does not quietly leave the contracting party uncovered. The coverage limits should meet or exceed the minimums in the agreement, and the policy dates should show that coverage is active on the day work begins or the lease commences, with enough runway to avoid an immediate lapse.
Beyond those basics, the team confirms that the property owner and manager appear as a certificate holder and, where required, as an additional insured. For a roofing contractor, an HVAC technician, or a general contractor running a tenant build-out, the team also looks for endorsements such as primary and noncontributory wording and a waiver of subrogation, since those provisions determine how the vendor's coverage responds relative to the owner's own policy. A certificate that lists the right limits but omits these endorsements can leave a gap that surfaces only when a claim is filed, which is why careful reviewers read the description box and request the underlying endorsement pages for higher-risk work.
What a COI includes
A certificate of insurance presents a consistent set of details. Knowing what each part means helps a property team verify coverage accurately.
1. The insured and the insurer
The COI names the party that holds the coverage, such as the vendor or tenant, and identifies the insurance company or companies providing it. This establishes who is covered and who stands behind the policy.
2. Coverage types and limits
The document lists the policies in force, such as general liability, workers compensation, and automobile liability, along with the dollar limits for each. Property teams check these against the limits their agreements require.
3. Effective and expiration dates
Each policy shows when coverage begins and ends. The expiration date is critical, since it tells the property team when a renewed certificate must be collected to avoid a lapse in proof of coverage.
4. Certificate holder and additional insured
The certificate holder is the party receiving the COI. Where required, the property owner or manager is also listed as an additional insured, extending the vendor's coverage to protect them directly.
5. Description and endorsements
A description field and any referenced endorsements clarify specific terms, such as the project or property covered and confirmation of additional insured or waiver of subrogation provisions where these are required.
It helps to remember that the certificate references the policy rather than replacing it. The COI is a snapshot that says, in effect, these policies existed with these limits on this date. The legal protection actually comes from the policy itself and its endorsements. This distinction matters most for additional insured status, which must be granted by an endorsement to the policy rather than simply noted on the certificate. Careful property teams therefore confirm that the required endorsements genuinely exist, especially for higher-risk work, rather than relying on the certificate's summary alone.
Key takeaways
- A COI is a standardized summary, often the ACORD 25 form, proving that active insurance coverage is in place.
- Property teams require COIs so that a tenant's or vendor's insurance responds to claims arising from their activity.
- Because coverage expires, COIs must be tracked and renewed continuously, not collected just once.
How COI tracking works
Collecting a certificate is only the beginning. Managing COIs across many tenants and vendors is an ongoing process that property teams handle in a series of clear steps.
First, the team defines requirements, setting the coverage types, minimum limits, and additional insured language each vendor or tenant must carry, usually drawn from the lease or vendor agreement. Next, they collect the COI before work begins or a lease starts, and review it to confirm the coverage, limits, and additional insured status all meet the requirements. The team then records the expiration date and sets a reminder to request a renewed certificate before the current one lapses. Finally, they store the document in a central, retrievable place so it can be produced for audits, claims, or transactions. When this cycle runs reliably, the property always has current proof of coverage on file for everyone who works there.
Scale is what makes this process demanding. A single mid-size office building can involve dozens of recurring vendors, from janitorial crews and landscapers to elevator technicians and fire-life-safety inspectors, each with its own renewal date. Add a full tenant roster, and a regional portfolio can be tracking hundreds of certificates at once, each governed by different requirements. A consistent, repeatable workflow is what keeps that volume from turning into a backlog of expired or missing coverage.
Common COI tracking pitfalls
Even diligent teams run into recurring problems when certificates are managed by hand. The most common is the silent expiration, where a certificate that was valid at onboarding quietly lapses months later and no one notices until a claim or an audit brings it to light. Spreadsheet tracking makes this worse, because a single missed date or an unupdated row can hide a gap for an entire portfolio.
A second pitfall is accepting a certificate at face value without confirming the substance behind it. A COI might name the owner as a certificate holder while never actually adding them as an additional insured by endorsement, which means the protection the team assumed exists is not there. Mismatched entity names, limits that fall just below the contract minimum, and coverage that excludes the specific type of work being performed are all easy to miss in a quick visual scan. A third pitfall is fragmented storage, with certificates scattered across email inboxes, shared drives, and individual managers' files. When a certificate cannot be located quickly during a claim or a property sale, the document loses much of its value. Addressing these pitfalls is where structured, automated tracking pays off most clearly, turning a reactive scramble into continuous, verifiable assurance.
Best practices
Teams that manage certificates of insurance well tend to treat the process as a continuous, structured workflow rather than a pile of paperwork. A few habits make the difference.
- Define clear, written requirements for coverage types, limits, and additional insured language, drawn directly from leases and vendor agreements.
- Collect the COI before work or occupancy begins, never allowing uninsured vendors on site or tenants to operate without verified coverage.
- Track expiration dates and automate reminders, so renewed certificates are requested before coverage lapses.
- Verify additional insured status, confirming the owner is genuinely protected rather than assuming a checked box is enough.
- Store certificates centrally, linking each one to the vendor or tenant so the document can be retrieved instantly when needed.
The goal is continuous assurance. When requirements are clear, collection happens up front, and expirations are tracked automatically, the property maintains uninterrupted proof of coverage and the owner stays protected at all times.
Coverage types at a glance
A COI typically reflects several distinct policies, each protecting against a different kind of risk. The table below summarizes the coverage types property teams most often verify.
| Coverage type | What it protects against |
|---|---|
| General liability | Third-party bodily injury and property damage arising from operations on the property. |
| Workers compensation | Injury to a vendor's or tenant's own employees while working. |
| Automobile liability | Accidents involving vehicles used in connection with the work. |
| Umbrella or excess liability | Additional limits above the underlying policies for larger claims. |
| Professional liability | Claims arising from professional services or advice, where relevant. |
| Property insurance | Damage to a tenant's own property or improvements within their space. |
How Cove approaches certificates of insurance
Cove treats certificates of insurance as part of the connected fabric of building operations rather than a separate filing task. COIs live alongside vendor records, work orders, and tenant data, so a vendor's coverage can be verified before a work order is assigned, an expiring certificate triggers a reminder automatically, and every document stays linked to the party and the property it protects.
This connected approach reflects Cove's role as the operating system for commercial real estate. Insurance data informs operations, intelligence flags expirations and gaps before they become exposures, and owners gain continuous assurance from a single source of truth. By keeping proof of coverage current and visible, Cove helps teams manage risk with confidence, fully in keeping with being Built for Buildings and Designed for What's Next.
Frequently asked questions
What is a certificate of insurance (COI)?
A certificate of insurance is a standardized one-page document, most often the ACORD 25 form, issued by an insurer or broker to prove that a party holds active insurance coverage. It summarizes the policies in force, the coverage types, the limits, and the effective and expiration dates, giving a third party confidence that valid insurance is in place.
What is the ACORD 25 form?
ACORD 25 is the standardized certificate of liability insurance form created by ACORD, an organization that develops standard insurance forms. It is the most common format for a certificate of insurance in the United States, presenting coverage details in a consistent layout that recipients across industries recognize and can read quickly.
Why do property managers require a COI from vendors?
Property managers require COIs to confirm that any vendor working on a property carries adequate insurance before work begins. If a vendor causes injury or damage, their insurance, rather than the owner's, should respond. Being named as an additional insured on the vendor's policy extends that protection directly to the property owner.
What does additional insured mean on a COI?
Additional insured status means the property owner or manager is added to the vendor's insurance policy so they are also protected by it. If a claim arises from the vendor's work, the vendor's coverage extends to the named additional insured, which is why leases and vendor agreements commonly require it.