OperationsLast updated: July 16, 2026

Certificate of Insurance (COI)

Also known as:COIproof of insurance

A certificate of insurance, commonly abbreviated COI, is a one-page document issued by an insurer or agent that summarizes the key details of an active policy, including the coverage types, limits, effective dates, and named insured. It serves as proof that coverage is in force but does not itself alter the underlying policy or grant any rights beyond what the policy provides. Short-term rental hosts frequently request COIs from cleaners, maintenance vendors, and contractors to verify those parties carry their own liability coverage, and hosts may in turn be asked to provide a COI by property owners, homeowners associations, or platforms. A certificate can also list an additional insured or a certificate holder when a third party needs evidence of coverage. Hosts should confirm the certificate reflects current, adequate limits and consult a licensed insurance agent when specific requirements apply.

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Why this matters for property managers

This document is what a platform, owner, or lender asks for as proof that coverage is real and current before they trust an operator with a booking or a contract. Producing it quickly can be the difference between winning a management account and losing it to a competitor. An expired or mismatched certificate, however, can void a claim or breach a contract term, so its dates and limits must actually match the exposure.


Frequently Asked Questions

Why would I ask a vendor for a certificate of insurance?

A COI confirms that a cleaner, contractor, or maintenance provider carries their own liability coverage, which can protect you if they cause injury or damage while working at your property.

Does a certificate of insurance provide coverage by itself?

No. A COI is only evidence that a policy exists; it summarizes the coverage but does not create or change any coverage on its own.

Who might ask me for a COI as a host?

Property owners, homeowners associations, some booking platforms, and building managers may request a COI as proof that you carry adequate liability coverage.

What is an additional insured on a COI?

An additional insured is a party added to a policy so it also receives certain protections, often requested when someone wants direct coverage under another party's policy. Confirm the wording with a licensed insurance agent.

Related Terms


Related Guides

  • Insurance OverviewShort-term rentals fall outside most homeowner policies. Compare insurance, damage waivers, and AirCover to protect your rental with the right coverage.


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