COI vs. Endorsements: A Must-Know for Employers
Scott Kakacek
Understanding the Insurance Landscape
Employers who work with contractors, vendors, or third-party service providers frequently encounter terms like Certificate of Insurance (COI) and endorsements. While they might seem synonymous, they serve different purposes. Understanding these differences is crucial to protecting your business from potential risks and liabilities. Do you know if a COI is enough, or should you request an endorsement? This blog aims to break down the key differences between COIs and endorsements, explain why each matters, and provide actionable steps for employers.What is a Certificate of Insurance (COI)?
A Certificate of Insurance (COI) is a summary document issued by an insurer, confirming that a business or individual has active coverage. Here’s what you typically find in a COI:- Policyholder’s name
- Coverage types (e.g., general liability, workers’ compensation, auto insurance)
- Policy limits and effective dates
- Insurer’s contact details
Understanding Endorsements (Policy Modifications)
An endorsement, also known as a rider, is a modification to an existing policy that adds, removes, or alters coverage terms. Common examples of endorsements include:- Increasing policy limits
- Adding an additional insured (e.g., listing the employer on the contractor’s policy)
- Expanding protection to cover new risks
Key Differences: COI vs. Endorsements
- A COI serves as proof of existing insurance but does not alter policy terms.
- An endorsement legally modifies a policy, potentially adding or removing coverage.
Employer Best Practices
To ensure proper coverage, employers should:- Always request a COI before engaging contractors or vendors.
- Review COI details carefully, checking policy limits and expiration dates.
- If additional coverage is needed, request an endorsement to ensure proper protection.



