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.
Read page →The ACORD 25 form, explained
A practical walkthrough of the ACORD 25 certificate of liability insurance: every section explained, plus the traps hidden in the checkboxes and the description box.
Read page →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.
Read page →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.
Read page →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.
Read page →Free COI tracking spreadsheet template
Download a free COI tracking spreadsheet template — pre-built columns for policies, limits, endorsements and expiry dates, opens in Excel or Google Sheets, no email required. Plus the failure modes that eventually end every tracking spreadsheet.
Read page →Subcontractor prequalification, explained
The complete subcontractor prequalification packet — W-9, licenses, COI with endorsements, OSHA 300A, EMR, financials — what each document proves and how to collect it without making subs pay.
Read page →Subcontractor prequalification form template
Download a free subcontractor prequalification form covering insurance and endorsements, licenses, safety (EMR, TRIR from the OSHA 300A), financials and references. Printable PDF, no email required — with guidance on what each section catches.
Read page →What ISNetworld actually costs (and who pays)
ISNetworld costs roughly $875–$5,000+ per contractor per year as of 2026, sized by headcount, plus setup fees. Full breakdown of who pays what, Avetta and Veriforce compared, and the GC-paid alternative.
Read page →What myCOI actually costs (as far as anyone can tell)
myCOI doesn't publish pricing. What's known as of 2026: quote-based plans, reported annual minimums in the thousands for review-team tiers, and per-use charges reported for extras — vs. flat published pricing from $79/mo.
Read page →What TrustLayer costs (and what the free tier really covers)
TrustLayer offers a free starter tier for basic COI tracking; paid plans are quote-based as of 2026. What the free tier covers, where it stops, and how flat-priced alternatives compare from $79/mo.
Read page →The best COI tracking software in 2026, compared honestly
The 2026 COI tracking software landscape compared: CoverWarden, myCOI, Jones, TrustLayer, BCS, Billy, COI File and TrackMyVendor — by pricing model, endorsement review depth and turnaround. Written by CoverWarden, biases disclosed.
Read page →Certificate of insurance sample, annotated
A complete sample certificate of insurance on the ACORD 25 form: download the PDF, then walk through every box — limits, endorsements, holder — annotated in plain English.
Read page →Certificate holder vs. additional insured
Certificate holder means you get a piece of paper. Additional insured means you get coverage. The difference, the risks of confusing them, and how to verify each.
Read page →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.
Read page →COI request letters that actually get certificates back
Three copy-paste certificate of insurance request templates — new vendor, renewal, and non-compliant certificate — with the exact requirements language that prevents re-requests.
Read page →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.
Read page →What insurance to require from your vendors
A practical guide to setting vendor insurance requirements: baseline limits, when to require workers comp and umbrellas, which endorsements matter, and enforcement.
Read page →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.
Read page →How much does a certificate of insurance cost?
A certificate of insurance is usually free from your insurer or broker. Learn what can cost extra, including the underlying policy, endorsements and COI administration.
Read page →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.
Read page →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.
Read page →Workers' comp waiver of subrogation, explained
Understand workers' compensation waiver of subrogation endorsements, including WC 00 03 13, blanket vs scheduled waivers, possible premium charges and COI verification.
Read page →What is a blanket additional insured endorsement?
A blanket additional insured endorsement can add parties required by written contract without listing each one. Learn the conditions, limitations and verification steps.
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