How Do You Show Additional Insurance on a COI?

What Does "Additional Insured" Actually Mean?

“Additional insured” refers to someone added to the contractor’s insurance policy (other than the policyholder) who can receive coverage or protection for claims. Instead of relying on your own insurance coverage, you have access to theirs. Those costs and liabilities fall under their policy and not yours.

When you’re listed as an additional insured, the contractor’s policy covers:

• Property damage caused by their work
• Bodily injury connected to their activities
• Certain liabilities tied to their operations on your site

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Can a Certificate Holder Be an Additional Insured?

A certificate holder doesn’t automatically become an additional insured. Being a certificate holder means you receive the COI, but it doesn’t provide you with any coverage. You only become an additional insured if the contractor’s insurer officially adds you to the policy and lists that status on the COI. 

In many projects, you may be listed as both the certificate holder and the additional insured. 

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Where Additional Insured Status Shows Up on a Certificate of Insurance

On a standard ACORD 25 COI, additional insured status appears in two places:

• “ADDL INSD” checkbox‍
  
  • The ADDL INSD checkbox next to the General Liability line may be marked to show that an additional insured endorsement exists. 

• “Description of Operations” section‍
  
  • This section lists the detailed wording, like: “[Your Company Name] is included as an additional insured as required by written contract.” However, if the section says:
    
    • “Certificate holder only.”
    • “For informational purposes only.”

Then you are not an additional insured. These phrases indicate the COI is being issued for reference and fails to extend any coverage to you.

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What Does the ADDL INSD Checkbox Actually Tell You?

The ADDL INSD checkbox is a visual indicator that an additional insured endorsement exists on the contractor’s General Liability insurance policy. 

• If checked (often with an “X”), it tells you the insurer issued an endorsement. The section doesn’t show the full details, like which endorsement applies or what the coverage includes.
• If blank, the status may not be provided, or you may need to review attached endorsements or look at the Description of Operations for the specific language.

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How to Read the Insurer's Affording Coverage Section

To add you as an additional insured, the contractor reaches out to their insurance provider and requests an endorsement listing your company exactly as it is written in your agreement. Providing your exact name upfront helps the insurer avoid delays and prevents multiple revisions of the COI.

Once added, the contractor’s policy extends certain protections to you, making it easy to confirm the coverage matches what your agreement requires.

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How Do You Name an Additional Insured on an Insurance Policy?

If a contractor needs to list you as an additional insured, they contact their insurance company and request the endorsement using your legal name. The agent submits the request to the insurer, which issues the endorsement and updates the contractor’s policy. The insurer then reissues the COI to reflect the change.

The revised COI reflects these changes by:

• Marking the ADDL INSD box next to the General Liability section
• Listing the additional insured wording in the Description of Operations
• Including any required endorsements tied to your contact

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Can You Add Additional Insured to a Work Comp Policy?

No. Workers’ compensation policies never allow additional insured because they only cover the employer’s own employees. 

If you need to protect a contractor or third party related to workers' compensation concerns, the appropriate alternative is a waiver of subrogation rather than an additional insured endorsement. 

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How Do I Add Additional Insured to My Policy?

If you need to add someone else to your insurance policy, just share their legal name with your agent and request the additional insured endorsement. Your agent updates your policy and sends you a COI that shows the added language. 

You can then pass that COI along to the hiring party as proof that their insurance requirement has been met.

To read more about how to add an additional insured on a COI, read our blog.

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What Your Insurance Agent Needs to Know

Sharing the right details helps your agent issue the endorsement without delays. They’ll need:

• Your exact legal name as it appears in the contract
• A copy of the agreement or contract requiring the additional insured endorsement
• Any required wording for the Description of Operations
• Coverage limits the other party expects
• Any special endorsements, such as primary and non-contributory, or waiver of subrogation
• Project details, including the location and scope of work

Teams rely on illumend to ensure the details they send to agents are accurate and complete, reducing delay and preventing rework.

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Common Mistakes When Reviewing Additional Insured Status

These mistakes cause the most confusion and back-and-forth:

• Assuming the certificate holder is automatically an additional insured
• Relying only on the ADDL INSD checkbox without checking the Description of Operations
• Missing or incorrect legal names
• Expecting additional insured status on policies that don’t allow it, like workers’ compensation
• Not asking for attached endorsements when the certificate references them
• Overlooking special requirements, such as primary and non-contributory wording or completed operations
• Skipping the contract review

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How illumend Simplifies Additional Insured Verification

illumend makes reviewing additional insured status straightforward by turning a traditionally confusing task into a guided, automated workflow. The compliance platform uses AI precision to check COIs for the right additional insured language, required endorsements, and contract-specific wording.

With one-click vendor invites, you can request compliant COIs without chasing emails or managing separate logins. Real-time compliance decisions highlight whether the COI meets your requirements. 

illumend gives you a simple, reliable way to verify additional insured status and keep every project protected, compliant, and moving forward. Schedule a demo today.