A certificate of insurance (COI) is evidence summarizing certain insurance information as of the certificate date. It is not the policy, does not create coverage by itself, and generally does not amend, extend, or alter the policy. Relying on the certificate without verification can leave a business uninsured for the actual contract risk.
What a certificate usually shows
- Named insured and producer
- Insurers and policy numbers
- Types of coverage
- Policy effective and expiration dates
- Limits
- Certificate holder
- Operations or location description
- Cancellation language and authorized representative
Each item must match the contract and the party performing the work. Similar names or a parent-company policy should not be assumed to cover another legal entity.
What a COI does not prove
| Assumption | Why it is unsafe |
|---|---|
| “The certificate makes us an additional insured.” | Status generally depends on policy wording or an endorsement, not the certificate alone. |
| “The limit is fully available.” | Claims, aggregates, deductibles, and self-insured retentions may affect protection. |
| “Every operation is covered.” | Exclusions, classifications, territory, and completed-operations terms matter. |
| “We will always receive cancellation notice.” | Rights depend on policy and applicable requirements, not a generic expectation. |
Additional insured and other contract terms
A contract may require additional-insured status, primary and noncontributory wording, waiver of subrogation, specified limits, completed-operations coverage, or notice. Ask for the applicable endorsement or policy evidence and have a qualified insurance professional or lawyer confirm that it satisfies the agreement. The certificate holder box alone does not grant these rights.
Verification checklist
- Match the named insured to the contracting party.
- Confirm insurer, policy numbers, dates, coverage types, and limits.
- Check whether the work, location, vehicles, workers, and professional services require separate coverage.
- Obtain required endorsements and relevant policy language.
- Contact the producer using independently verified details if authenticity is uncertain.
- Track expiration and require renewal before work continues.
- Store the certificate, endorsements, contract, and verification evidence together.
Detect altered or misleading certificates
Look for inconsistent fonts, missing fields, altered limits, impossible dates, mismatched names, or contact details that do not match public records. Do not call only the number printed on a suspicious document. Use the controls in the business scam awareness guide.
Build a risk-based COI process
Set requirements based on work, contract, jurisdiction, loss severity, and professional insurance advice. Assign who requests evidence, who reviews exceptions, who tracks renewal, and who can stop work. A certificate process complements—not replaces—vendor diligence, safe operations, indemnity review, and legal analysis.
For high-value agreements, involve counsel using the selection process in How to Choose a Business Lawyer.
Frequently asked questions
Is a COI an insurance contract?
No. It summarizes information and states that it does not replace or amend the underlying policy.
Does being a certificate holder make me an additional insured?
No. Additional-insured rights generally require applicable policy language or endorsement.
Should certificates be renewed every year?
Track coverage continuously for the required period. Obtain updated evidence at expiration and when policies or work change.
Sources reviewed
Last reviewed: August 15, 2026. General U.S. education only; coverage and certificate requirements depend on policy, contract, facts, and jurisdiction.