Subcontractor Refuses to Provide a Certificate of Insurance: What to Do

A subcontractor who won't produce a certificate of insurance is not just an administrative headache — they are an unquantified liability sitting on your project. You do not know what coverage they carry, whether your company is named as an additional insured, or whether a claim on their work becomes entirely your problem. This post gives you a structured response: why they refuse, what leverage you already have, how to escalate, and what to verify when the certificate finally arrives.

By Nick Streicher, Founder, StrikeDocs. Published 2026-06-01.

Why subcontractors refuse — and what each reason signals

Before you escalate, diagnose the refusal. The reason changes the appropriate response.

"My broker is slow." This is the most common and most benign excuse. The subcontractor has coverage; their broker has not issued the certificate yet, or it went to the wrong email. Give a 48-hour deadline, get the broker's direct contact, and move on. If two deadlines pass, the problem is no longer the broker.

"I forgot / didn't know you needed one." Happens with smaller subs who have never worked for a GC that enforced compliance. This is a process failure on your end as much as theirs — if the subcontract did not explicitly require a COI before mobilization, you have limited grounds to threaten termination. Fix the contract language going forward and give a short cure period now.

"My policy doesn't include [the endorsement you want]." This is the honest version of a problem most subs obscure. They have coverage, but it does not include additional insured status, a waiver of subrogation, or primary-and-noncontributory language. The certificate would reveal the gap, so they delay. This is the situation you need to take seriously — the sub is effectively telling you they are underinsured for your requirements.

"I can't afford to add you as an additional insured." Adding a project-specific additional insured endorsement can cost $0 to a few hundred dollars depending on the carrier. If a sub claims it is prohibitively expensive, they are either negotiating or their carrier has already declined the endorsement — possibly because of prior claims. Both scenarios warrant scrutiny.

"My policy is with a surplus lines carrier and they don't issue ACORD 25s." Technically possible, but rare. Surplus lines carriers do issue certificates. What the sub usually means is that the certificate would show a non-admitted carrier — which is a legitimate concern for you, since non-admitted carriers are not backed by state guaranty funds. Ask for the declaration page instead and verify the carrier's financial rating directly through AM Best or the NAIC.

Outright refusal with no reason given. Red flag. A legitimate subcontractor with legitimate coverage has no reason to withhold a certificate. This is either a coverage gap, a lapsed policy, or a subcontractor who has learned that some GCs will not enforce the requirement. All three outcomes are bad for you.

Your contractual leverage: what the subcontract should already say

Your leverage depends almost entirely on what is in the subcontract. Before you pick up the phone, pull the executed agreement and look for three things.

1. A condition precedent to mobilization. The strongest language ties payment of the first invoice — or physical access to the site — to receipt of a compliant COI. If your contract says something like "Subcontractor shall not commence Work until Owner/GC has received and approved evidence of the required insurance," you have a clear, enforceable hook.

2. A cure period and termination right. Most well-drafted subcontracts give the sub a short window (3–7 days is common) to cure an insurance deficiency before the GC can terminate for cause. Without this, termination is harder to defend.

3. The specific insurance requirements. If your contract lists minimum limits, required endorsements, and the additional insured language, you can measure the sub's refusal against a clear standard. Vague language like "subcontractor shall carry adequate insurance" is nearly unenforceable.

If none of these provisions exist, you are negotiating, not enforcing. Document every communication in writing anyway — it creates a record for any future dispute and signals to the sub that you are serious.

For a deeper look at what a COI actually proves (and what it doesn't), see our post on what a COI covers before you decide what to demand.

The escalation ladder

Do not jump to termination on day one. An escalation ladder protects you legally and is more likely to produce the certificate.

Step 1 — Written request with a deadline (Day 1). Send an email referencing the specific subcontract clause and setting a deadline of 48–72 business hours. Attach the certificate request template if you have one. Copy your project manager and the sub's project lead. Do not call instead of emailing — you need a written record.

Step 2 — Broker outreach (Day 2). Ask the sub to copy you on an email to their broker, or ask for the broker's contact directly. Most brokers will issue a certificate within hours once they receive a proper request. The broker has no incentive to delay — they get paid when their client's contracts stay intact.

Step 3 — Work stoppage notice (Day 4–5). If the deadline passes, issue a written notice that the sub may not continue work (or may not mobilize, if they have not started) until the COI is received. Reference the contract clause. This is not termination — it is a work stoppage pending compliance. It focuses attention without burning the relationship.

Step 4 — Cure notice (Day 6–7). If the work stoppage notice produces no certificate within 24 hours, issue a formal cure notice under the termination clause. Set a final deadline — typically the contractual cure period. State explicitly that failure to cure will result in termination for cause.

Step 5 — Termination or waiver decision. At the end of the cure period, you have two options: terminate or consciously waive the requirement. A conscious waiver should be in writing, should document why you are proceeding anyway (schedule pressure, no alternative sub, etc.), and should note any compensating risk controls. An undocumented waiver is just exposure.

One thing to watch: if you are mid-project and the sub is the only one who knows the work, termination has real schedule and cost consequences. That is not a reason to ignore the requirement — it is a reason to enforce it from day one before the sub has leverage.

What we learned running 59 real COIs through StrikeDocs

We ran 59 construction certificates through StrikeDocs and the data reinforces why the refusal problem matters even when subs do eventually provide a certificate.

Only 33.9% of policies showed an Additional Insured endorsement. That means roughly two out of three policies handed to a GC offered no additional insured protection at all — the most basic protection a GC should require.
Only 21.3% of policies included a Waiver of Subrogation. Without it, the sub's carrier can pursue your company for contribution after paying a claim, even on a job where you contractually required the waiver.
100% of GL policies in the sample carried limits below $1 million per occurrence — with a median each-occurrence limit of just $10,000 and a range of $2,500 to $40,000. These are not typos. They represent real certificates that reached real GC desks.

The practical implication: a sub who eventually hands you a certificate is not necessarily compliant. The certificate may show limits that are a fraction of your contract requirement and may be missing every endorsement you specified. Getting the certificate is step one. Verifying its contents is step two — and it is where most GC offices fail.

You can run any certificate through StrikeDocs' free batch COI audit to flag missing endorsements, limit shortfalls, and expiring policies without reading every box manually.

When you do get the COI, verify it actually covers you

A subcontractor who resisted providing a certificate often provides a deficient one. Here is what to check immediately.

Additional insured endorsement — which form? The gold standard for ongoing operations is CG 20 10; for completed operations it is CG 20 37. CG 20 26 (designated person or organization) is weaker because it requires the additional insured to be scheduled by name — and many certificates that claim additional insured status use the older, broader blanket forms that carriers have since restricted. Check the endorsement form number on the certificate, not just the checkbox. Our CG 20 10 decoder and CG 20 26 decoder walk through exactly what each form provides.

Primary and noncontributory language. Without it, the sub's policy and your policy share a loss proportionally. Your policy gets eroded by a claim that should be entirely on the sub's carrier. Only 15.5% of policies in our sample showed primary-and-noncontributory language.

Limits. Compare the limits on the certificate to the minimums in your subcontract. A $1 million GL each-occurrence limit with a $2 million aggregate is a common floor for commercial construction — but as the data above shows, certificates with limits in the $2,500–$40,000 range do reach GC desks.

Expiration dates. A certificate that expires in 30 days on a 6-month project means you need a renewal certificate mid-project. Build a tickler into your tracking system. The ACORD 25 form guide explains exactly where to find the policy period on a certificate.

Named insured. The name on the certificate must match the legal entity in your subcontract. A certificate from "Smith Electrical LLC" does not cover work performed by "Smith Electrical Inc." — they are different legal entities.

A structured compliance check from StrikeDocs looks like this:

ISSUE: Additional Insured endorsement not present on GL policy
FIELD: Endorsements
SEVERITY: HIGH

ISSUE: GL each-occurrence limit ($500,000) below contract minimum ($1,000,000)
FIELD: Each Occurrence
SEVERITY: HIGH

ISSUE: Waiver of Subrogation not endorsed on Workers Compensation policy
FIELD: WC Endorsements
SEVERITY: MEDIUM

ISSUE: Policy expiration (2026-08-15) precedes project completion date (2026-11-30)
FIELD: Policy Period
SEVERITY: MEDIUM

This is what a manual review misses when a GC office is processing 20 certificates a week.

Special situations

Verbal promises of coverage. "I'm covered, don't worry about it" is not coverage. It is not even evidence of coverage. If a claim occurs and you cannot produce a certificate showing you were named as an additional insured, your owner, your lender, and your own carrier will treat you as uninsured for that subcontractor's work. Do not accept verbal assurances under any circumstances.

Mid-project policy lapse. A sub who provides a certificate at mobilization and then lets their policy lapse mid-project is a different problem than one who refuses from the start — but equally dangerous. Carrier cancellation notices go to the named insured, not to you. The only way to catch a mid-project lapse is to require 30-day cancellation notice endorsements (look for them in the certificate's description box) and to re-verify coverage at intervals on long projects. The subcontractor insurance verification post covers ongoing verification workflows in detail.

Owner-mandated subcontractors. If your owner or CM required you to use a specific subcontractor and that sub refuses to provide a certificate, you have a different conversation — with the owner. Document in writing that you requested the certificate, the sub refused, and you are asking the owner to either compel compliance or formally accept the risk. Do not absorb the exposure silently just because you did not select the sub.

Sole-source subs with schedule leverage. Specialized trades (curtainwall, certain MEP systems) sometimes know they cannot be replaced mid-project and use that leverage passively. The antidote is contract enforcement at award, not at mobilization. If the subcontract is silent on COI requirements or has no cure-and-termination provision, you have already lost the leverage before the first certificate request is sent.

Multi-state projects. Insurance requirements vary by state — particularly for workers compensation and contractor licensing. A certificate that is compliant in Texas may not satisfy New York's requirements. See our COI compliance requirements by state post for the specific differences that matter most.

Protecting yourself before the next subcontract is signed

Most of the problems described above are preventable at contract execution. These are the changes worth making before the next award.

Make COI receipt a condition precedent to contract execution, not just mobilization. If the sub cannot produce a compliant certificate before you countersign the subcontract, you have already learned something important about how they will operate on your project.

Specify endorsements by ISO form number. "Additional insured endorsement required" is ambiguous. "CG 20 10 04 13 for ongoing operations and CG 20 37 04 13 for completed operations" is not. Carriers know exactly what these forms are, brokers know how to add them, and you know what to look for on the certificate.

Require 30-day written notice of cancellation. Some states require carriers to provide this automatically; others do not. Requiring it by contract and verifying it on the certificate gives you a minimum window to respond before coverage disappears.

Build a certificate tracking system. A spreadsheet shared across your project team is better than email inboxes. A purpose-built tool is better than a spreadsheet. At minimum, track: sub name, policy type, carrier, expiration date, whether AI and WOS endorsements are confirmed, and the date you last verified the certificate. Run the batch audit when a project opens and again 60 days before policies expire.

Include a right-to-cure clause with teeth. A cure period that ends in termination for cause — not just a vague right to demand compliance — is the only provision that focuses a sub's attention. Make sure the cure period is short enough to matter (3–5 business days is typical) and that termination for cause triggers the sub's obligation to pay for replacement costs.

The sub who refuses to provide a certificate today is the claim you are defending in 18 months. The certificate is not paperwork — it is the evidence that you are not the last dollar standing when something goes wrong.