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Additional Insured Endorsements in Commercial Contracts
Faculty of InsuranceLiability Insurance
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The certificate of insurance arrived 14 months ago, attached to an email from a mechanical subcontractor confirming its commercial general liability coverage and listing a general contractor as an additional insured. At the time, a project coordinator at the general contractor's office downloaded the document, confirmed that the contractor's name appeared in the additional insured section, and filed it electronically without further review. The certificate joined dozens of similar documents collected during the mobilization phase of a 22-month retail development project in southern Ontario, where the general contractor had been retained by a property development company to construct a multi-unit commercial plaza.

The construction contract between the property owner and the general contractor required the contractor to maintain commercial general liability insurance of not less than $5 million per occurrence and to name the property owner as an additional insured on that policy. The contract further required the general contractor to ensure that all subcontractors carried their own liability coverage of at least $2 million per occurrence and named both the general contractor and the property owner as additional insureds on those policies. Standard language in the subcontract agreements incorporated these insurance requirements by reference and obligated each subcontractor to provide certificates of insurance as evidence of compliance before commencing work.

The mechanical subcontractor completed its scope of work, which included installation of the heating, ventilation, and air conditioning systems across all 8 units in the plaza, approximately 9 months ago. Final inspections were conducted, deficiency lists were cleared, and the subcontractor's trades left the site. The general contractor's work on the project concluded 4 months later, and occupancy permits issued to the first commercial tenants shortly thereafter.

A fire originating in the mechanical room of 1 of the units caused extensive damage to 3 adjacent retail spaces last month. Preliminary investigation by the fire marshal's office has identified the HVAC installation as a potential origin point, though the final report remains pending. The property owner has notified both the general contractor and the mechanical subcontractor of a potential claim. The property owner's legal counsel has now requested copies of all insurance documentation, including the original policies and endorsements, not merely the certificates that were exchanged during construction. The general contractor's risk manager, reviewing the file for the first time since the project began, has discovered that the certificates collected during mobilization may not reflect what the underlying policies actually provide.

Verifying Additional Insured Status: What to Check Before Relying on a Certificate

Certificates of insurance circulate through Canadian commerce by the thousands every day, changing hands between contractors and property owners, between vendors and retailers, between service providers and the organizations that hire them. These single-page documents, often generated electronically and transmitted as email attachments, have become the standard currency of risk transfer verification. A project manager in Toronto receives one from a subcontractor and places it in a file. A facilities director in Calgary collects a stack of them from maintenance vendors and assumes her organization is protected. A property owner in Vancouver reviews the certificate attached to a lease and signs the agreement, confident that the tenant's liability policy names the building ownership as an additional insured. Yet in each of these scenarios, the certificate itself may provide far less assurance than its recipient believes. The final lesson in this course addresses the critical gap between what certificates of insurance appear to promise and what additional insured status actually delivers, equipping readers with the practical skills to verify coverage before relying on it in ways that could prove costly.

The certificate of insurance originated as a convenience document, a snapshot summary of coverage that allowed one party to demonstrate insurance to another without producing complete policy documents. In Canada, as in other jurisdictions, these certificates typically follow standardized formats developed by industry bodies, with the ACORD 25 form being perhaps the most widely recognized template. The Insurance Bureau of Canada has also developed certificate forms used across the country. These forms contain spaces for identifying the insured, listing policies in effect, noting coverage limits, and indicating whether additional insureds have been added to the policy. What they do not contain, and what their standard language explicitly disclaims, is any actual grant of coverage or modification of policy terms. The disclaimer language appearing on virtually every certificate of insurance states, in one formulation or another, that the certificate is issued as a matter of information only and confers no rights upon the certificate holder, that the certificate does not amend, extend, or alter the coverage afforded by the policies listed. This disclaimer represents not mere legal boilerplate but an accurate statement of the certificate's legal effect.

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More in this program

The CGL Policy: Structure, Coverage Grants, and the Insuring Agreement
Commercial General Liability: Structure and Triggers
The Duty to Defend: What It Means, When It Applies, and How It Differs from the Duty to Indemnify
Defending a Liability Claim: The Insurer's Role and Yours
Occurrence Coverage: What It Is and How It Handles Claims That Surface Years Later
Occurrence vs. Claims-Made: Why the Distinction Matters