Practical guide
Certificate of Insurance (COI): a plain-English guide
What a COI shows, what it does not show, and what to check before sending one to a client or venue.
Insurance paperwork is easiest to manage when you separate the contract requirement, actual policy, endorsement, evidence, and renewal deadline instead of treating them as one document.
What a COI is
A certificate of insurance summarizes certain policy information at a point in time. It is commonly requested by clients, landlords, venues, and general contractors as evidence that specified insurance is in force.
A certificate is evidence of insurance at a point in time. If a contract requires additional-insured status or another policy change, confirm the actual endorsement.
What a COI is not
A certificate does not itself rewrite the policy, guarantee that every claim will be covered, or automatically make the certificate holder an additional insured. If additional-insured status is required, the policy and endorsement should be checked.
What to compare with the contract
Compare the named insured, policy dates, coverage type, limits, certificate holder, and any requested additional-insured wording. If the contract is unclear, ask the requesting party what exact evidence they need.
Common mistake
Do not assume that adding a client's name to a certificate changes coverage. The insurer or authorized producer should handle certificates and endorsements.
Step-by-step workflow
- Ask the client, venue, landlord, or general contractor for the complete written insurance requirements.
- Confirm the exact legal entity name, project address, dates, limits, and coverage lines.
- Send the clause to the insurer or broker instead of paraphrasing it.
- If additional-insured, waiver, or priority wording is required, confirm the actual endorsement.
- Review the issued COI for name, policy dates, limits, and delivery instructions.
- Save the COI and endorsements with the signed contract and set a renewal reminder if the job continues past expiration.
Common mistakes to avoid
Treating certificate holder as the same as additional insured
Typing unsupported policy promises into a certificate description box
Using a certificate that expires before the project or event
Ignoring a separate endorsement requirement in the contract
Listing the storefront brand instead of the requesting party’s legal entity
Assuming an old client’s requirements did not change at renewal
Documents to keep together
Store the evidence needed to reconstruct the decision later. A clean project file makes renewal, client audits, and claim reporting easier.
- Client or venue insurance clause
- Current declarations
- COI issued by insurer/agent/broker
- Additional-insured endorsement if required
- Primary/noncontributory or waiver endorsement if required
- Written client acceptance of any negotiated wording
Primary sources
Frequently asked questions
Does a COI create insurance coverage?
No. It is evidence of insurance. The policy and endorsements determine coverage.
Is a certificate holder automatically an additional insured?
No. Additional-insured status must come from the policy or endorsement.
Can I edit a COI myself?
Request corrections through the insurer, agent, or broker. Do not create unsupported wording manually.
Free companion template
COI Request Email Template
A copy-and-send request that gives your agent the legal entity, project, limits, dates, and endorsement wording needed to prepare accurate evidence.
Keep going
Coverage finder + research library
Map your business activities to coverage categories, then use the long-tail article library to dig into the contract or policy mechanic that applies.