How to Verify Contractor Insurance: A 2026 Homeowner’s Guide

Table of Contents

• What Is a Certificate of Insurance for Contractors?
  • Key Details on a Certificate of Insurance
• How to Check Workers Compensation Coverage for Contractors
  • Where the Coverage Comes From
  • What a Clearance Letter Actually Shows
  • How to Verify It
  • Sole Operators and Exemptions
  • Why This Matters More Than Homeowners Expect
• Step-by-Step: How to Verify Contractor Insurance Before Work Begins
  • Requesting Proof of Insurance from Your Contractor
  • Contacting the Insurance Carrier to Confirm Validity
• Questions to Ask a Contractor Before Hiring
• Insurance Fraud Red Flags: How to Spot a Fake Certificate
• Template Email to Request Proof of Insurance
• Post-Verification Monitoring: Keeping Coverage Active
• Frequently Asked Questions

Last Updated: September 16, 2026

What Is a Certificate of Insurance for Contractors?

A certificate of insurance for contractors is a one-page document from an insurance carrier that proves a contractor holds active liability coverage. It names the policyholder, the insurer, the coverage type, and the policy limits, and it is the first thing you should ask for before any work begins.

At Mario Laflamme Contracting & Renovation Ltd, we provide our certificate before work begins, and we expect homeowners to read it carefully. A certificate of insurance is not a guarantee, though. It is a snapshot in time, and the details on it are what separate real proof of coverage from a piece of paper that means nothing.

Key Details on a Certificate of Insurance

Every certificate follows a standard layout, and the same fields matter on all of them. Check these before you sign anything:

• Named insured: the legal name of the contractor’s business, which must match the name on your contract
• Insurance carrier: the company issuing the policy, with a phone number you can call to confirm validity
• Policy number: the reference the carrier uses to pull up the account
• Coverage type: general liability, workers compensation, or both
• Policy limits: the maximum the insurer pays per claim, shown as a pair of numbers
• Effective date and expiry date: the window during which the policy is active
• Certificate holder: you, if you have asked to be named

The single most common mistake is checking the contractor’s name and nothing else.

How to Check Workers Compensation Coverage for Contractors

Workers compensation coverage for contractors is the part homeowners skip, and it is the one that protects you most. If a worker is injured on your property and the contractor has no coverage, you can be pulled into the claim as the property owner.

Where the Coverage Comes From

In Canada, workers compensation is administered provincially, not by private insurers. That means the document you want is not a line on the liability certificate, it is a clearance letter or a letter of good standing issued by the provincial workers compensation authority where the contractor operates. The authority maintains the account, collects premiums, and issues the clearance that confirms the contractor is in good standing.

What a Clearance Letter Actually Shows

A clearance letter is a point-in-time statement. It typically shows:

• The legal name of the contractor’s business and the account number
• The period the clearance covers (often a specific date range, not an open-ended promise)
• A statement that the account is in good standing as of the issue date
• The authority’s contact information so you can confirm it

How to Verify It

1. Ask for the clearance letter directly from the contractor, by email, the same way you ask for the certificate of insurance.
2. Check the issue date and the coverage period against your project timeline.
3. Confirm the legal business name matches the name on your contract and on the liability certificate.
4. Contact the provincial authority using the number on the letter, not a number the contractor provides, and confirm the account is in good standing.
5. Re-request the clearance at the midpoint of any project that runs past the letter’s coverage period.

A common pattern is a contractor whose account has fallen into arrears while the liability certificate still looks perfectly valid. The two documents are issued by different parties, so a clean certificate of insurance does not mean the workers compensation account is current.

Sole Operators and Exemptions

If the contractor works alone and has no employees, they may be exempt from mandatory coverage in their province, or they may have optional coverage. Ask them to state their status in writing, an email is enough, and keep it with your contract. “I work alone and I’m exempt” in writing is worth more than a verbal assurance, because it puts the responsibility for that claim on the contractor if it turns out to be wrong.

Why This Matters More Than Homeowners Expect

If an uninsured worker is injured on your property, the claim does not stop at the contractor. As the property owner, you can be named in the action, and your home insurance may or may not respond depending on your policy and the circumstances. The clearance letter is the document that shifts that risk back where it belongs. It takes one phone call to confirm, and it is the single highest-value check in the entire verification process.

Step-by-Step: How to Verify Contractor Insurance Before Work Begins

Verifying contractor insurance takes about fifteen minutes if you know what to look for. The process is simple: collect the documents, read the key fields, then call the carrier to confirm the policy is real and active.

Here is the sequence we recommend:

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1. Ask for the certificate before the contract is signed. Not after. A contractor who hesitates at this stage is telling you something.
2. Match the business name on the certificate to the name on your quote and contract.
3. Check the effective and expiry dates against your project duration. The policy must cover the entire build, not just the start date.
4. Read the policy limits. Ask what they mean in plain terms if the numbers are unclear.
5. Confirm workers compensation coverage separately.
6. Call the insurance carrier and confirm the policy is active and the certificate is genuine.
7. Save everything. Keep the certificate, the clearance letter, and your notes in one folder.

Requesting Proof of Insurance from Your Contractor

Requesting proof of insurance should be a normal, no-friction part of hiring. A professional contractor keeps a current certificate on file and sends it the same day.

Contacting the Insurance Carrier to Confirm Validity

Contacting the insurance carrier is the step that catches fakes. The phone number on the certificate should reach the carrier’s office, and an agent can confirm the policy number, the named insured, the coverage type, and whether the policy is still in force.

Questions to Ask a Contractor Before Hiring

The right questions to ask a contractor before hiring go beyond price and timeline. Insurance and licensing questions reveal how a contractor runs their business, and the answers tell you whether you are dealing with a professional or a gamble.

• Are you licensed for this type of work, and what is your licence number?
• Can you send your certificate of insurance and your workers compensation clearance today?
• What are your general liability policy limits?
• Will you be using subcontractors, and are they insured?
• Who is my main point of contact once work starts?
• How do you handle unexpected discoveries, like hidden water damage or outdated wiring?
• Can you provide references from similar projects?

Insurance Fraud Red Flags: How to Spot a Fake Certificate

Fake certificates are more common than most homeowners realize, and they are usually spotted through small inconsistencies rather than obvious forgeries. The document itself can look perfect while the policy behind it does not exist.

Watch for these signals:

• A carrier name you cannot find online, or a phone number that rings to a cell rather than a business line
• A policy number that the carrier cannot locate when you call
• Blurry or low-resolution scans, especially around the dates or limits
• A named insured that does not match the business on your contract
• A certificate that arrives “just in time” after repeated requests
• Reluctance to let you call the carrier directly
• Cash-only payment demands paired with no written contract

Template Email to Request Proof of Insurance

Copy this email, fill in the blanks, and send it before you sign anything. It puts the request in writing and gives the contractor a clear, professional path to respond.

Post-Verification Monitoring: Keeping Coverage Active

Verification is not a one-time task. Policies lapse, contractors switch carriers, and a certificate that was valid in March can be worthless by July. For any project running longer than a few weeks, check coverage again at the midpoint.