What Is a Certificate of Insurance (COI) and Why It Matters for Arizona Businesses 

What Is a Certificate of Insurance (COI) and Why It Matters for Arizona Businesses 

A Certificate of Insurance (COI) is proof of coverage, not the policy itself.


What a COI Shows

  • Named insured
  • Policy numbers
  • Coverage types
  • Limits
  • Effective dates
  • Certificate holder


What a COI Does Not Do

  • Modify coverage
  • Guarantee coverage for a specific claim
  • Automatically add additional insured status
  • Replace policy language


Why COIs Matter

Commercial contracts often require specific limits, additional insured endorsements, waivers of subrogation, and primary & non-contributory wording.


Common Mistakes

  • Not reviewing contract requirements before issuing a certificate
  • Failing to update annually
  • Assuming certificate equals endorsement


Best Practices

  • Review contracts first
  • Verify endorsements
  • Track expiration dates
  • Maintain organized certificate log


For help reviewing contract insurance requirements, contact Prosperity North Advisors to schedule a consultation.

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At Prosperity North Advisors, we help business owners and individuals simplify insurance, understand their options, and make confident choices. From small business coverage to personal protection, we’re here to protect your prosperity.