Short answer
A certificate of insurance does not make your client an additional insured. It summarizes the coverage you carry, while the endorsement on the policy is what changes who is covered. When a contract requires additional insured status, waiver of subrogation or primary and non-contributory wording, the policy usually needs the matching endorsements before the certificate says so.
What a certificate of insurance actually is
The standard certificate form, published by ACORD, states on its face that it is issued for information only and gives the certificate holder no rights. It also says it does not change the policies it lists.
In plain terms, the certificate tells your client what you carry, with which insurer, at what limits and for what dates. It cannot add anything to the policy.
Where the additional insured endorsement comes in
If your contract says the client must be an additional insured, the policy itself has to change. That change is an endorsement. The certificate form notes that when the holder is an additional insured, the policy must be endorsed.
A checked box on the certificate is not enough when a contract requires additional insured status, waiver of subrogation or primary and non-contributory wording. Many public agencies say this in their own instructions and ask for endorsement pages along with the certificate. Georgia Tech Facilities’ design professional insurance requirements show one example. Our article on OCP vs. additional insured explains how additional insured status works.
What to send with a certificate of insurance
- The certificate, with the client listed as certificate holder
- The endorsement pages for each requirement the contract lists, usually on general liability and auto
- Nothing extra on professional liability that the policy cannot support
Professional liability policies often handle additional insured requests differently from general liability, so confirm with your agent before promising it.
Why getting the certificate right matters
An incorrect certificate can cause more than an annoying email. Some contracts let a client hold payment until the insurance paperwork is right. A certificate that overstates coverage can also create problems if a claim arrives and the client expected protection they never had.
Example: the rejected certificate
A small engineering firm receives a contract that requires additional insured status and a waiver of subrogation on general liability. The office manager sends a certificate listing the client as certificate holder and nothing else. The client’s risk team rejects it and asks for endorsement pages.
The agent confirms which endorsements the policy already includes and requests any that are missing. The firm sends both documents, and payment continues without delay.
This example is hypothetical. Coverage depends on the actual policy terms, conditions and the insurer’s underwriting.
What to check before you send
- Read the contract’s insurance section first, not the client’s email.
- List each requirement next to the policy it belongs to.
- Confirm the endorsements exist before the certificate says they do.
- Check the dates and make sure the policy period covers the work.
- If something does not fit, ask your agent before you send.
Related questions
Can my agent just add the client as additional insured on the certificate?
The certificate can show it, but the policy has to be endorsed for it to be real.
Why does the client want endorsement pages?
Their risk team knows the certificate alone does not confer rights. The endorsement pages show what the policy actually says.