Proof of insurance is the paperwork that sits quietly in your HR, legal, and risk management files until someone asks for it and then it's suddenly urgent. A new commercial lease requires evidence of general liability coverage. A customer contract demands a certificate of insurance naming them as additional insured. An employee questions whether their health plan counted as minimum essential coverage for last year's tax return. Each scenario has its own specific document, its own requirements, and its own stakeholder. Building a process that keeps these documents current, accessible, and correctly formatted is part of the day-to-day work of HR and risk management.
The Certificate of Insurance: The Most Common Proof A certificate of insurance (COI), typically on ACORD form 25, is a one-page summary of an insurance policy. It lists the carrier, policy number, coverage amounts, effective dates, and additional insured parties. COIs are the standard document employers provide to landlords, customers, and vendors to prove coverage, and the document employers collect from vendors and contractors to verify their coverage.
COIs are informational. They summarize the policy but don't modify it. A COI showing a customer as additional insured is only meaningful if the actual policy endorsement adds that customer. Customers and vendors sometimes assume the COI creates coverage, when in reality it just reflects it. Mismatches between the COI and the actual policy are a common source of coverage disputes.
Proof of Insurance for Employees Under the ACA Employers subject to the Affordable Care Act's employer mandate (applicable large employers with 50 or more full-time equivalent employees) must file IRS Forms 1094-C and 1095-C annually. Each full-time employee receives a Form 1095-C documenting the coverage offered during the year. These forms serve as the employee's proof of insurance for their own tax filing and as the employer's proof of compliance with the ACA's employer shared responsibility rules.
Smaller employers with fully insured plans generally don't file 1095-C, though their insurance carriers file Form 1095-B documenting coverage provided to individual subscribers. The filing deadlines are set by the IRS: January 31 for furnishing to individuals and February 28 (or March 31 if filing electronically) for filing with the IRS.
What Happens If an Employee Loses Their 1095? Employees can request a duplicate from the employer (or the insurance carrier if the form came from the carrier). The employer has to maintain records of furnished forms for at least three years from the due date, so duplicating a form is usually straightforward. Many payroll providers host 1095s in the employee self-service portal for several years, which saves on duplicate requests.
Collecting Proof of Insurance from Independent Contractors Most companies require independent contractors to carry their own general liability insurance, and often workers' compensation coverage if they'll be on the company's premises. Collecting and verifying these COIs before work begins protects the company from vicarious liability exposure when a contractor causes injury or damage.
Three collection best practices. Require the COI before work starts, not after. Verify the coverage amounts meet the company's contract requirements. Set up renewal tracking so expiring COIs are collected before the expiration date rather than after. Manual tracking (spreadsheets, email reminders) works for small contractor rosters; larger operations usually need a COI management platform.
Running a Proof of Insurance Program That Doesn't Break Five operational elements make proof of insurance management sustainable. A central repository for all COIs and insurance documentation, accessible to HR, finance, and risk management. A clear intake process: who requests COIs, who verifies them, who approves them, who stores them. A renewal tracking system that catches expiring COIs before they lapse. A standard set of minimum coverage amounts by contractor type, documented in vendor contracts. And a periodic audit that confirms the repository matches actual vendor and contractor records.
The Department of Labor at dol.gov and state insurance departments publish the rules that apply to specific coverage types. The IRS publishes the ACA reporting requirements and current form instructions at irs.gov/affordable-care-act/employers . Pair the proof of insurance workflow with your broader workers' compensation and risk management programs so the documentation feeds into the larger compliance picture.
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