Why You Need a Certificate of Insurance From Every Sub

Why this matters

A certificate of insurance is the cheapest protection you can demand from a sub, and skipping it on one "trusted" regular is exactly how an uninsured claim lands on you. But the certificate is also the most misunderstood document in the trade: shops collect it, file it, and assume it means more than it does. Knowing what a certificate proves, what it does not, and how to verify it is the difference between real protection and a false sense of it.

What a certificate of insurance is

A certificate of insurance (COI) is a one-page summary, issued by the sub's insurance agent, showing that the sub had certain policies with certain limits on the day it was issued. It lists the coverage types (general liability, workers comp, auto), the limits, the policy dates, and who the named insured is. It is proof-of-the-moment that coverage existed. That is genuinely useful: a sub who cannot produce one probably does not carry real coverage.

What a certificate does not do

Here is where shops get fooled. The certificate is a snapshot and a summary, not a guarantee.

• It does not grant you any rights. The certificate itself is informational. Being listed on it does not make you a protected party; that takes an actual endorsement to the policy (see additional insured below).
• It can be out of date the day after it is issued. Coverage can be cancelled or lapse for non-payment after the certificate prints, and nobody sends you an update unless your agreement requires it.
• It does not show exclusions or gaps. The policy behind it may exclude the exact work the sub is doing for you, and the certificate will not tell you.

Treat the certificate as a starting point you verify, not a final answer you file and forget.

How to read one

• Match the named insured to the exact business you hired. A certificate for a different entity, or for one person when a crew is working, does not cover the work in front of you.
• Check the coverage types against what the job needs: general liability at least, workers comp if they bring help, auto if they drive.
• Check the limits against the risk of your job, not just that a number exists.
• Check the policy dates cover the whole period your work will run, and re-collect before they expire on a long job.

Additional insured: the part that actually protects you

The single most important step is to require, and confirm, that you are named as an additional insured by endorsement on the sub's general liability policy. Additional insured status means the sub's policy can defend and pay a claim arising from their work on your behalf, not just theirs. A checkbox or a line on the certificate is not the endorsement, so ask for the endorsement form itself, because the certificate can claim additional-insured status that the policy does not actually grant.

Collect it every time, verify at the source, track it

• Every sub, every time, no exceptions. The one you skip because you trust them is the one who lapsed.
• Verify at the source. Get the certificate from the sub's agent, or call the agent to confirm, rather than accepting a copy the sub could have altered.
• Track the expiration. A certificate with a lapsed date is worthless. Put every sub's expiration where your system reminds you before it passes, and require the sub to notify you of any cancellation.

A certificate on file with a verified additional-insured endorsement and a tracked expiration is real protection. A certificate collected once and forgotten is decoration.

References

• Trade-standard practice for certificate-of-insurance collection and verification
• Your commercial insurance agent or broker on additional-insured endorsements
• See related: The Insurance and Indemnity a Sub Must Carry; A Sub's Insurance Certificate Expired Mid-Project (decision tree)