The 8 Endorsement Clauses That Break COI Compliance

TL;DR: Eight common endorsements quietly defeat COI compliance even when limits look right: residential exclusions, contractual liability limits, sole-employee exclusions, prior-work exclusions, classification limitations, subcontractor warranties, cross-suits exclusions, and SIR/deductible erosion. Request the actual endorsement pages (not just the ACORD 25) and scan exclusions for "residential," "1-4 family," and "insured contract" language before approving any sub.

A Certificate of Insurance can list all the right limits, name you as Additional Insured, reference Primary and Non-Contributory language, and still leave you completely exposed if the underlying policy contains the wrong endorsement. Endorsements are where insurance policies get their real terms, and many endorsements silently defeat the protection a GC thinks they have.

This post walks through the 8 specific endorsement clauses that most commonly break subcontractor COI compliance, how each one affects coverage, and what GCs should look for before accepting a certificate.

The Problem: COIs Summarize, Endorsements Control

The ACORD 25 Certificate of Insurance is a snapshot. It tells you the policy exists with certain limits and certain effective dates, and that certain endorsements are attached, but the COI doesn't show you the language of those endorsements. A policy with perfect-looking AI and PNC references on the COI can still contain exclusionary endorsements that gut the coverage.

The only way to know what's really in the policy is to request and review the actual endorsement pages, and even then, you need to know what to look for.

Here are the 8 endorsement clauses that cause the most trouble.

1. Residential Exclusion

Many commercial general liability policies exclude coverage for work performed on residential buildings (typically defined as 1-to-4 family dwellings, but sometimes broader). The exclusion is especially common on policies written for commercial subcontractors who occasionally take small residential jobs.

Why it matters: if your project is residential in nature and the sub's policy excludes residential work, the sub has no real coverage for your project. The COI won't tell you about the exclusion unless the producer specifically notes it. ACORD 855 in New York asks about this explicitly, which is one reason the form exists.

How to spot it: request the policy's exclusion pages and scan for "residential," "dwelling," or "1-4 family" language. If you see any of these in an exclusion, follow up immediately.

2. Contractual Liability Limitation

Standard CGL policies include contractual liability coverage, which means the insurer will defend the insured against claims brought under an indemnification agreement. Some policies, however, carry endorsements that limit or exclude contractual liability. Common variations:

• Coverage only for "insured contracts" (as defined in the policy), which may be narrower than your subcontract's indemnification clause
• Specific exclusions for additional insured obligations beyond the standard CGL form
• Monetary caps on contractual liability coverage

Why it matters: your subcontract almost certainly has an indemnification clause that transfers risk from you to the sub. If the sub's insurance doesn't cover that indemnification, the sub is liable but the insurance won't pay. You end up collecting from a sub who may not have assets.

How to spot it: request the declarations page and any endorsements referencing "contractual liability." Look for exclusions or sub-limits.

3. Employee Exclusions and "Sole Employee" Language

Some CGL policies exclude coverage for bodily injury to the insured's own employees. This is standard because WC is supposed to handle employee injuries, but some policies have "sole employee" exclusions that are much broader, excluding any claim by an employee against anyone else (including the GC or owner).

Why it matters: if a sub's employee is injured on your project and sues the GC, you'd normally look to the sub's CGL via Additional Insured status to defend you. A sole employee exclusion can defeat that, leaving you to defend with your own insurance.

How to spot it: request the exclusion pages and look for any employee-related exclusion broader than the standard workers' comp carve-out. "Cross-liability" endorsements can remedy this gap if present.

4. "Your Work" Completed Operations Exclusion

A standard CGL covers damage to others' property and bodily injury caused by the insured's work. It does not cover damage to the insured's own work (that's what warranties and builder's risk are for), but some policies have broader "your work" exclusions that extend beyond first-party damage to exclude claims arising from any work performed by the insured.

Why it matters: construction defect claims frequently involve damage to other parts of the project caused by one sub's defective work. If the sub's policy has an aggressive "your work" exclusion, the policy may not respond to claims that should reasonably be covered.

How to spot it: request the policy's exclusion pages and look for "your work" language. Compare the scope of the exclusion against what standard ISO CGL forms exclude.

5. Earth Movement / Subsidence Exclusion

Some sub policies exclude damage caused by earth movement, subsidence, or ground movement. This is a common exclusion for excavation, grading, and foundation work, where the exposure is obvious.

Why it matters: if you're hiring a sub to do excavation or foundation work and their policy excludes earth movement, the core exposure of their work is uncovered. This is a direct contradiction of the purpose of having them insured at all.

How to spot it: especially relevant for earthwork, excavation, foundation, and demolition subs. Request exclusions and verify ground-movement losses are covered.

6. Assault and Battery Exclusion

Some policies exclude bodily injury claims arising from assault, battery, or other physical altercations. This exclusion is common on policies written for bars and restaurants, but it occasionally shows up on construction CGL too, especially for security-related work or projects in high-crime areas.

Why it matters: workplace altercations happen on construction sites. If a sub's employee gets into a fight with another worker and injures them, the assault exclusion can defeat coverage.

How to spot it: check exclusions. More relevant for subs providing security services or working on sites with known crowd-control issues.

7. Professional Services Exclusion

Standard CGL policies exclude coverage for claims arising from professional services (engineering, design, consulting). Some policies extend this exclusion broadly, excluding coverage for any claim that touches on professional judgment or advice.

Why it matters: subs who perform design-assist work, constructability review, or other quasi-professional services can find their CGL refuses to cover a claim because the insurer classifies the work as professional. The sub should carry Professional Liability (E&O) coverage separately for this work.

How to spot it: relevant when hiring specialty subs who touch design or engineering (even tangentially). Confirm the sub carries separate Professional Liability insurance and verify the CGL's professional services exclusion won't defeat coverage for the hands-on construction work.

8. Prior Acts and Retroactive Date Limitations

"Claims-made" policies only cover claims reported during the policy period, often with a retroactive date restricting coverage to incidents occurring after that date. Construction defect claims typically surface months or years after the work is performed, so a claims-made CGL with an aggressive retroactive date can leave the sub with no coverage for old work.

Why it matters: you want subcontractor CGL to be "occurrence-based" rather than "claims-made" so that claims arising from the sub's work are covered based on when the incident happened, not when it was reported. Claims-made policies with short retroactive periods are a trap.

How to spot it: check whether the policy is "Occurrence" or "Claims-Made" on the ACORD 25 coverages box. For claims-made policies, request the retroactive date and any tail coverage provisions.

The Common Thread

Every one of these eight clauses has the same structural problem: the COI looks fine, but the policy contains language that defeats coverage in the exact situation you need it. The only way to catch these gaps is to:

1. Require the sub to provide actual policy exclusion and endorsement pages, not just the COI
2. Review the pages against a checklist of known problem clauses
3. Flag anything concerning and escalate to the sub's producer or your own broker
4. Document your review so there's a record of your good-faith verification

This is why serious construction insurance programs include attorney review of sub insurance documentation on large projects. For smaller projects where attorney review isn't practical, a structured internal review process captures the most common gaps.

How PaperBoss Helps

PaperBoss stores the COI alongside whatever supporting documentation you require: endorsement pages, exclusion summaries, declarations pages, producer attestations. When a claim hits 18 months later and you need to verify what coverage was in place at the time, pulling up the sub's full file takes seconds instead of hours digging through email.

PaperBoss doesn't review policies for you. That still requires human judgment or attorney involvement for high-risk projects. But PaperBoss organizes the documentation so the review can actually happen.

For smaller GCs without a full-time risk manager, the workflow is: require the endorsement pages, upload them to PaperBoss, review against a checklist like this one, document the review in the sub's file. Every year, the cumulative library of verified sub documentation becomes a real risk management asset.

Start a 14-day free trial, no credit card required.

Frequently Asked Questions

How do I know if a sub's policy has one of these exclusions?

Request the actual policy exclusion pages and endorsement forms from the sub's producer. Don't rely on the COI alone. A producer who refuses to provide underlying policy documents is a red flag.

Can I require the sub to remove an exclusion?

You can require the sub to obtain insurance that doesn't contain the exclusion. Removing an exclusion mid-policy is usually not possible, but the sub may be able to buy an endorsement that adds back coverage (for example, an endorsement that deletes a residential exclusion).

What if I accept a COI and later discover an exclusion?

If an incident happens during the policy period and the exclusion defeats coverage, you may have a bad-faith or E&O claim against the producer who issued the COI (for failing to disclose material information), but that's a lawsuit, not a guarantee of recovery. The better path is to catch exclusions before accepting the certificate.

Are all of these exclusions common?

No. Residential exclusions and claims-made restrictions are relatively common. Earth movement exclusions show up on earthwork-related policies. Others are rare but occasionally present. The point isn't that every COI will have these problems, but that any of them can sneak through if you don't review the endorsements.

Can PaperBoss verify policy exclusions automatically?

Not directly. Automated policy review is hard even with advanced AI, and false confidence is more dangerous than manual review. PaperBoss organizes documentation and tracks what's been reviewed, but the actual review requires human judgment (especially for high-value projects where attorney involvement is appropriate).

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This article is for educational purposes only and does not constitute legal or insurance advice. Policy endorsements and exclusions vary widely between carriers. Consult a construction insurance broker or attorney for specific policy review and coverage questions.