How do you verify contractor insurance before work begins?

Does a COI prove that a contractor is legitimate?

No. A certificate of insurance summarizes information associated with insurance policies, but it does not validate the contractor's complete identity, competence, licensing, safety practices, financial capacity, or ability to perform the work. Insurance evidence is one part of a broader contractor prequalification and risk-management process.

Depending on the work and jurisdiction, separate due diligence may include confirming the legal business entity, applicable licenses, references, safety history, experience, contractual capacity, and other project qualifications. Avoid presenting a COI as a universal “legitimate contractor” badge.

Seven steps to verify contractor insurance evidence

1. Start with the applicable requirements

Locate the governing contract, project requirements, work period, and scope. Verification has no reliable baseline until the reviewer knows what evidence is required.

2. Match the named insured

Compare the named insured with the legal entity that signed the contract and will perform the work. Trade names, parent companies, and related entities should not be treated as automatic matches.

3. Review every required coverage

Check the listed coverage types, policy identifiers, effective dates, expiration dates, and limits. Evaluate each requirement separately instead of approving the document based on appearance.

4. Confirm certificate holder details

Check the required holder name and address, while remembering that being listed as certificate holder is not the same as having additional-insured status or other policy rights.

5. Review required endorsements

When the contract requires additional-insured, waiver, primary and noncontributory, or other wording, obtain the appropriate supporting evidence. A note in the description box may not replace the required endorsement.

6. Resolve discrepancies through authorized channels

Ask the contractor to coordinate corrections or clarification with their insurance professional. Do not alter the certificate or assume that ambiguous information confirms coverage.

7. Record the human decision

Store the source file, requirements used, reviewer, date, outcome, reason, and follow-up action. Schedule renewal outreach if accepted evidence will expire during the work.

What should trigger closer review?

A red flag is a reason to investigate, not automatic proof of fraud or noncompliance. Common signals include:

• The named insured differs from the contracting entity without explanation.
• Required rows are blank, dates have passed, or the work period extends beyond expiration.
• Limits do not match the recorded project requirements.
• Requested endorsements are missing or inconsistent with the policy shown.
• The certificate holder or project information is incorrect.
• The file appears altered, incomplete, difficult to read, or inconsistent across pages.
• The contractor cannot route reasonable questions to an authorized insurance contact.

Turn verification into a repeatable process

Use the same COI review checklist for every submission while preserving project-specific requirements. Track missing evidence, documents awaiting review, rejected items awaiting correction, upcoming expirations, and the history of every decision.

If you have not collected the evidence yet, start with how to request a certificate of insurance. For ongoing operations, see the complete subcontractor COI tracking workflow.

Frequently asked contractor insurance questions

Can you verify insurance from a COI alone?

Not always. A COI is not the policy and may not establish every required term. Supporting endorsements, policy documents, or clarification from authorized insurance professionals may be necessary.

Should I contact the insurance carrier directly?

Follow your organization's approved process and the contact information associated with the evidence. The contractor and their authorized agent or broker are typical starting points; qualified reviewers should handle coverage questions.

How often should contractor insurance be checked?

Check evidence before applicable work begins, when a document or policy period changes, when project requirements change, and before recorded expiration. The precise cadence should follow your contracts and risk process.