COI guides written for the person who has to approve the certificate.
Plain-English answers, verification checklists and working templates for certificates of insurance, endorsements, vendor requirements and subcontractor compliance.
What is a certificate of insurance?
What a certificate of insurance actually proves, what it doesn't, and how to verify one — ACORD 25, limits, additional insured and endorsements explained.
- What a COI proves — and what it doesn't
- How to verify a COI properly
The ACORD 25 form, explained
A practical ACORD 25 certificate walkthrough: every section explained, plus the traps hidden in its checkboxes and description box.
- The header: producer, insured, insurers
- The coverage grid
What is a waiver of subrogation?
What a waiver of subrogation is, why contracts require it, the CG 24 04 endorsement, and how to verify a waiver is really attached to a vendor's policy.
- Why contracts require it
- How to verify a waiver on a COI
What does primary and non-contributory mean?
What 'primary and non-contributory' means, why additional insureds need it, the CG 20 01 endorsement, and how to verify P&NC wording on a certificate.
- How P&NC is actually granted
- Verifying P&NC on a certificate
What is an additional insured?
What additional insured status means, how blanket and scheduled endorsements work, the difference between CG 20 10 and CG 20 37, and how to verify coverage.
- CG 20 10 — ongoing operations
- CG 20 37 — completed operations
Free COI tracking spreadsheet template
Download a free COI tracking spreadsheet with columns for policies, limits, endorsements, and expirations. Opens in Excel or Google Sheets.
- The columns that matter
- The process that keeps it alive
Subcontractor prequalification, explained
Use a subcontractor prequalification checklist for insurance, W-9s, licenses, OSHA 300A, EMR, financials, references, and document collection.
- The packet: six documents and what each proves
- Safety numbers: EMR, TRIR and DART in one paragraph each
Subcontractor prequalification form template
Download a free subcontractor prequalification form for insurance, licenses, OSHA 300A, EMR, financials, references, and vendor details.
- What the form collects, section by section
- Thresholds most GCs apply
What ISNetworld actually costs (and who pays)
Understand ISNetworld contractor pricing, setup and membership fees, who pays, what affects a quote, and how GC-paid alternatives differ.
- Where the money goes
- When the network model makes sense
What myCOI actually costs (as far as anyone can tell)
myCOI uses custom pricing. Learn what affects the quote, which review and service terms to ask about, and how transparent alternatives compare.
- Why the price is quote-based
- The comparison that matters: what the review costs per verdict
What TrustLayer costs (and what the free tier really covers)
TrustLayer offers a free Starter tier and custom paid plans. Compare buying questions, review depth, limits, and transparent alternatives.
- What free tiers in this category typically cover
- Flat-price comparison
The best COI tracking software in 2026, compared honestly
Compare eight COI tracking software tools by review model, endorsement depth, pricing transparency, and best-fit customer. Biases disclosed.
- The eight tools, one paragraph each
- How to choose in three questions
Certificate of insurance sample, annotated
Download an ACORD 25 certificate of insurance sample and review each field, including limits, endorsements, and certificate holder details.
- What this sample shows that most don't
- How to use it
Certificate holder vs. additional insured
Certificate holder and additional insured are not the same. Learn the coverage difference, the risk of confusing them, and how to verify both.
- What being a certificate holder gets you
- What being an additional insured gets you
ACORD 25 vs 27 vs 28: which form when
ACORD 25 evidences liability coverage; ACORD 27 and 28 evidence property coverage; ACORD 24 covers everything else. Which form to request and what each proves.
- ACORD 25 — Certificate of Liability Insurance
- ACORD 27 — Evidence of Property Insurance
COI request letters that actually get certificates back
Copy COI request email templates for a new vendor, renewal, or correction, with clear insurance requirements that reduce repeat requests.
- Template 1 — new vendor
- Template 2 — renewal (30 days out)
How to verify a certificate of insurance
The 7-point verification every COI needs: dates, limits, entities, endorsement pages, and the checkbox trap. Plus a free tool that runs all seven automatically.
- The 7 checks
- Verify one right now, free
What insurance to require from your vendors
Set vendor insurance requirements by risk: baseline limits, workers compensation, umbrella coverage, endorsements, and a workable enforcement process.
- The baseline (almost every vendor)
- When to require more
What COI tracking software actually costs
COI tracking software pricing ranges from $29/mo self-serve to $10,000+ annual service minimums. The three pricing models, what drives cost, and how to choose.
- Tier 1: basic trackers ($29–$50/month)
- Tier 2: software with real verification ($79–$300/month)
How much does a certificate of insurance cost?
A certificate of insurance is usually free from an insurer or broker. Learn what can cost extra, including policy changes, endorsements, and administration.
- What is free and what can cost money
- Why a request sometimes triggers a charge
How to get a certificate of insurance for your business
Need a certificate of insurance for your business? Learn who issues it, what information to send your broker, how long it takes and what requestors verify.
- Information to send your insurer or broker
- What the requestor will check
The COI requirements checklist: 12 checks before approval
Use this 12-point COI requirements checklist to verify insured names, limits, dates, carriers and endorsement pages before approving a vendor.
- Identity and authenticity
- Coverage, limits and timing
Workers' comp waiver of subrogation, explained
Understand workers comp waiver of subrogation, including WC 00 03 13, blanket vs scheduled forms, cost factors, and COI verification.
- WC 00 03 13 and state-specific forms
- Blanket versus scheduled waiver
What is a blanket additional insured endorsement?
Learn how a blanket additional insured endorsement works, who qualifies under a written contract, what can limit coverage, and how to verify the form.
- The written-contract trigger
- Ongoing and completed operations remain separate
What ISNetworld is, in plain English
ISNetworld explained: what ISN does, who pays, what a grade means, and what contractors actually have to submit to stay compliant.
- Who pays, and why that surprises people
- What you actually have to submit
What ISNetworld actually reviews on the safety side
The safety statistics, written programs and documents ISNetworld reviews, why RAVS submissions get rejected, and how thresholds vary by client.
- Your statistics
- Your written programs — where submissions fail
ISNetworld training, and what has to be documented
What ISNetworld training requirements involve, how training records are verified, and what contractors must document to satisfy client thresholds.
- What clients typically require
- Records are the deliverable
"ISNetworld certified" — what it actually means
What contractors mean by ISNetworld certified, the steps to reach a passing status, typical timelines, and why status varies by client.
- The path to a passing status
- How long it takes
What Avetta is, and how it differs from ISN
Avetta explained: how the supply-chain compliance network works, who pays, what suppliers submit, and how it compares to ISNetworld.
- What suppliers submit
- Cost and who pays
What Avetta costs a supplier
What Avetta costs suppliers, which factors move the quote, how connection fees stack across clients, and how a GC-paid model compares.
- What moves the number
- The costs that don't appear on the invoice
What Veriforce costs a contractor
What Veriforce costs contractors, how PEC and ComplyWorks fold in, which variables move the quote, and how the GC-paid model compares.
- What drives the quote
- The full cost
ISNetworld vs Avetta
ISNetworld and Avetta compared on cost, who pays, review process, industry footprint, and what to do when clients mandate both.
- Where they're the same
- Where they differ
What TRIR is, and what it actually tells a client
TRIR explained: what the total recordable incident rate measures, the formula, what counts as recordable, and how hiring clients read it.
- The formula
- What counts as recordable
How to calculate TRIR (with worked examples)
How to calculate TRIR from your OSHA 300A: the formula, worked examples, hours-worked pitfalls, and the errors that distort the rate.
- The formula and the two inputs
- Worked examples
DART rate, and why clients ask for it next to TRIR
DART rate explained: the formula, what counts toward days away, restricted or transferred, and how it differs from TRIR in prequalification.
- The formula
- What counts
EMR in construction, in plain terms
EMR explained for contractors: what an experience modification rate is, who issues it, why 1.0 matters, and how clients use it to gate bidding.
- What the number means
- Who issues it
The written safety programs ISNetworld asks for
What written safety programs ISNetworld RAVS reviewers ask for, the elements that cause rejections, and how to prepare a submission that passes.
- Which programs get requested
- Why submissions come back
What ComplyWorks is
ComplyWorks explained: what the contractor compliance network does, its Veriforce relationship, what suppliers submit, and who pays.
- What it collects
- Who pays
Collection is only the first step.
See how CoverWarden links every requirement to evidence, correction, approval, and renewal.