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Guide

Certificate of Insurance Requirements
What to ask for, by vendor type

Most teams collect certificates of insurance and very few read them properly. A certificate on file that does not actually cover the work is worse than no certificate, because it produces confidence rather than a question.

Cover types by vendorWhat to check on arrival
DIRECT ANSWERChecked August 2026

A certificate of insurance evidences that a vendor holds cover. What to require depends on what the vendor does: general liability applies broadly, workers compensation matters wherever people work on your premises, professional liability applies to advisory and design work, and cyber liability applies where a vendor handles your data. The certificate should be checked for named insured, cover limits, policy dates and any additional insured or waiver requirements you rely on.

Cover types by vendor

What usually applies to whom

Requirements should follow what the vendor actually does rather than a single policy applied to everyone.

Vendor typeCommonly requiredWhy
On-site contractors and tradesGeneral liability and workers compensationPeople are physically present, so both third party injury and employee injury are live exposures
Professional and advisory servicesProfessional liability, plus general liabilityThe exposure is advice and work product rather than physical damage
IT, software and data processorsCyber liability, plus general and professional liabilityThe exposure is data and availability rather than premises
Goods suppliers and distributorsGeneral liability, and product liability where relevantProduct defect exposure sits with what is supplied rather than how it is delivered
Transport and logisticsAuto liability and cargo cover, plus general liabilityVehicles and goods in transit are the specific exposures
What to check when one arrives

Five things, in about a minute

01

The named insured matches your vendor

A certificate in the name of a related company, a parent or a trading name is common and means the cover may not attach to the entity you contracted with.

02

Policy dates cover the work

A certificate valid today is not the same as cover for the whole engagement. The end date is the part that matters, and it is the part most often not recorded.

03

Limits meet your requirement

Both per occurrence and aggregate. An aggregate limit already partly consumed by other claims is a common gap.

04

Additional insured status where required

If your contract requires it, the certificate should evidence it rather than you assuming it follows automatically.

05

Cover types match the work

A general liability certificate from a professional services vendor evidences the wrong thing, and nobody notices because a certificate arrived.

06

The certificate is recent

A certificate issued two years ago for a policy that has since been renewed tells you about a policy that no longer exists. Check the issue date as well as the expiry.

Why tracking fails

It is always the same step

Every certificate tracking system in common use fails at one specific point.

StepWhat happens
The certificate arrivesFine, usually by email or through a portal
Somebody opens itAlso fine, though it waits in a queue at volume
Somebody types the expiry into a trackerThis is the failure point. It is manual, it is boring, and it is the first thing to slip when the week gets busy
Nobody notices it was skippedBecause a missing row in a tracker looks identical to a vendor with no certificate requirement
The certificate expiresAnd is discovered at the moment somebody needs it
What to do instead

Capture the date where it cannot be skipped

PracticeEffect
Collect certificates inside the onboarding questionnaireThe document arrives with the submission rather than through a separate thread
Capture the expiry when the document is readNo manual typing step exists, so there is nothing to skip
Track per document rather than per vendorA vendor with three policies has three dates, not one review date that misses two of them
Request only what expired at renewalVendors complete a single document request far more often than a full resubmission
Retain previous certificatesSo you can evidence what cover was in place at any point, not just what is current
Questions

About certificates of insurance

What should a certificate of insurance show?
The named insured, the types of cover held, the limits per occurrence and in aggregate, the policy effective and expiry dates, and any additional insured or waiver status your contract requires.
What insurance should we require from vendors?
It depends on what they do. General liability applies broadly, workers compensation where people are on your premises, professional liability for advisory work, cyber liability where they handle your data, and auto or cargo cover for transport.
What is the most common mistake?
Not checking that the named insured matches the entity you contracted with. Certificates in the name of a parent, affiliate or trading name are common and may not attach cover to your actual counterparty.
Why does certificate tracking fail?
Because it depends on somebody manually typing the expiry date into a tracker. That step is boring and skippable, and a skipped row looks the same as a vendor with no requirement.
Should we track per vendor or per document?
Per document. A vendor holding three policies has three separate expiry dates, and a single annual review date will miss two of them.
What should a renewal request ask for?
Only the expiring document. Sending the whole questionnaire again is why renewal requests so often go uncompleted.
Should previous certificates be kept?
Yes. Being able to show what cover was in place at a particular time is different from showing what is current, and it is the version that matters after an incident.
Related reading

Where to go next

Track certificates and expiry

The renewal runway, and keeping the request short.

Read more

Document collection

Certificates read on arrival with expiry captured automatically.

Read more

Subcontractor onboarding for construction

Where insurance decides whether work can start at all.

Read more

Bring a certificate you are unsure about

We will read it on the call and show what the record captures without anybody typing a date.