Certificate of Insurance in New York: A Guide for Long Island Businesses, Contractors and Tenants

Last updated September 28, 2026 by Matthew Kleinfelder, PRK Insurance Agency, Melville, NY.

A certificate of insurance, or COI, is often the last document standing between a Long Island business and a new contract, lease, permit or county license. Nassau and Suffolk County ask for one before issuing a home improvement license, town building departments ask for one before a permit, and general contractors, landlords, school districts and property managers ask for one before work begins. The certificate is a snapshot of active coverage. It does not replace the policy and it does not add coverage by itself. This guide from PRK Insurance Agency in Melville explains what a COI proves, how to read it, the New York rules that trip businesses up and how to make sure the next request does not hold up a job.

Certificate of insurance: the quick answer

A COI is a standardized document that summarizes selected insurance policies in force on the date it is issued. It commonly lists the named insured, insurance companies, policy types, policy numbers, effective and expiration dates, and limits. A client, general contractor, landlord, property manager, or government entity may request one as evidence that your business carries certain insurance.

• It is evidence, not the policy. The insurance contract, endorsements, exclusions, and conditions control the actual coverage.
• It should match the legal business name. Name or address mismatches can cause rejection.
• Limits and dates matter. The required coverage must be active for the relevant work or agreement.
• Special status must be supported by endorsements. Being named as a certificate holder is not the same as being an additional insured.
• New York workers’ compensation proof has separate rules. An ordinary ACORD certificate may not satisfy a government permit, license, or contract requirement.

What a COI proves and what it does not

A properly issued COI can show that listed policies existed when the certificate was prepared. It can help another party confirm key details without asking for an entire policy. This is why COIs are common in construction, property management, professional services, restaurants, retail, transportation, and many other industries.

A COI does not create new rights or change the policy. It cannot, by itself, broaden coverage, remove an exclusion, guarantee advance notice of cancellation, or make the certificate holder an additional insured. The New York State Department of Financial Services explains that a certificate should serve as evidence of insurance and should not amend, expand, or alter policy terms.

How to read the important parts of a certificate

Named insured

The named insured should correspond to the person or legal entity signing the contract. A trade name, DBA, subsidiary, or newly formed LLC may need to be scheduled correctly. If the contract is in one company’s name but the policy is in another, ask your insurance team to review the situation before sending the certificate.

Policy types and limits

Requests often specify commercial general liability, workers’ compensation, commercial auto, umbrella or excess liability, and professional liability. Compare every required limit with the certificate. A business owners policy may combine property and general liability for eligible businesses, but it does not automatically include every coverage a contract may require.

Businesses that use vehicles for work may also need commercial auto insurance. When a contract calls for limits above the primary policy, commercial excess liability insurance may help provide an additional layer, subject to its terms and underlying requirements.

Effective and expiration dates

Coverage should be active when work begins and remain in force for the required period. A certificate issued near renewal may expire soon, so plan for an updated certificate. The certificate’s issue date is not the same thing as a policy’s effective date.

Description of operations

This section may identify the project, location, agreement, or relevant endorsement information. It should be factual and consistent with the policy. Wording requested by a contract cannot simply be added if the underlying policy does not support it.

Certificate holder vs. additional insured

These terms are often confused:

• A certificate holder receives the COI as evidence of the listed insurance. That status alone does not provide coverage under your policy.
• An additional insured may receive certain protection under a liability policy when a valid endorsement and the policy terms provide it. The scope can vary by endorsement, contract, work, and claim.

A contract may also request primary and noncontributory wording or a waiver of subrogation. Those provisions are not interchangeable, and each may require specific policy language or endorsements. Send the complete insurance section of the contract, not only a one line email request, so your agent can identify what is actually being asked.

Common contract requirements for New York businesses

Insurance requirements should reflect the work being performed. A property owner hiring a contractor may request different protection than a client engaging a consultant. For example:

• Contractors: general liability, workers’ compensation, commercial auto, umbrella or excess liability, and appropriate additional-insured endorsements may be requested. Review construction insurance in New York before bidding or signing.
• Consultants and professional firms: clients may require errors and omissions insurance in addition to general liability.
• Employers: New York businesses with employees generally need to address workers’ compensation insurance and applicable disability and Paid Family Leave requirements.
• Businesses with vehicles: hired, non-owned, or owned auto exposures should be reviewed rather than assuming a personal policy or general liability policy will respond.

COI requests Long Island businesses should expect

The requests below come across our desk in Melville every week. Knowing what each party is likely to ask for lets you set the policies up once rather than scrambling before every job.

Nassau and Suffolk home improvement licenses

Nassau County’s Office of Consumer Affairs requires certificates of liability and property damage insurance and proof of workers’ compensation before it issues a home improvement license. Suffolk County’s home improvement law requires the same certificates before initial licensing and again whenever the insurance carrier changes, with proof that coverage remains in force at renewal. Keep the legal name on the license identical to the named insured on the policy. A license issued to an individual and a policy written to a newly formed LLC is the most common mismatch we see.

Town building departments and village permits

Building departments in the Towns of Hempstead, North Hempstead, Oyster Bay, Huntington, Babylon, Islip, Smithtown, Brookhaven, Riverhead, Southampton and East Hampton, and many incorporated villages, commonly require a certificate before issuing a permit. Some ask to be listed as certificate holder only, others require additional insured status. Ask the department for its exact wording before requesting the certificate so it can be issued correctly the first time.

Commercial landlords in Melville, Hauppauge, Garden City and Mineola

Office and industrial leases along Route 110, in the Hauppauge Industrial Park and in the Nassau office corridors typically require general liability at $1 million per occurrence and $2 million aggregate, additional insured status for the landlord and its management company, primary and noncontributory wording, a waiver of subrogation and evidence of property coverage on tenant improvements. Send the insurance section of the lease to your agent before you sign so the policy can be endorsed to match.

Schools, municipalities and public work

Long Island school districts, county agencies and municipalities usually require higher liability limits, umbrella or excess coverage, additional insured endorsements that include completed operations, and the New York specific workers’ compensation and disability forms described below rather than a standard ACORD certificate. Build those requirements into your bid pricing rather than discovering them at award.

New York workers’ compensation and disability proof

A standard liability certificate is not always acceptable proof for New York workers’ compensation. For a New York government permit, license, or contract, the correct form depends on the business and coverage. The New York State Workers’ Compensation Board identifies forms such as C-105.2 for certain privately insured employers, U-26.3 for New York State Insurance Fund coverage, DB-120.1 for disability and Paid Family Leave coverage where applicable, and CE-200 for businesses that qualify for an exemption.

The Board also states that an ACORD form is not acceptable proof of New York workers’ compensation coverage for these government purposes. C-105.2 may be issued by an eligible private carrier or a licensed New York agent of that carrier; the Board notes that brokers are not authorized to issue that form. Because the correct documentation is fact-specific, allow time for your insurance professional to coordinate it.

Why certificates are rejected

• The insured name does not match the contract.
• A required policy or limit is missing.
• The policy has expired or will expire before the work is complete.
• The certificate holder’s name or address is incorrect.
• The project or location is not identified clearly.
• Additional-insured, waiver-of-subrogation, or primary-and-noncontributory requirements are not supported by endorsements.
• The request calls for wording that would improperly change coverage through the certificate.
• The wrong workers’ compensation or disability form is supplied for a New York government requirement.

COI checklist before you send it

1. Confirm the legal business name and address.
2. Send your insurance representative the complete contract insurance section.
3. Identify the project, jobsite, lease, or agreement and the date work begins.
4. Verify required policies, limits, and active policy dates.
5. Confirm the certificate holder’s exact legal name and mailing address.
6. Ask whether additional-insured or other endorsements are required and available.
7. Check whether New York-specific workers’ compensation or disability forms are needed.
8. Review the completed certificate before forwarding it.
9. Keep the request, certificate, and supporting endorsements with your contract records.
10. Plan for renewal certificates if the relationship continues beyond policy expiration.

Prepare before the next opportunity

The best time to review certificate requirements is before a deadline. If your business regularly bids on projects, leases space, uses subcontractors, or signs client agreements, build an insurance-review step into your process. Keep legal entity names consistent, tell your agent when operations change, and avoid promising a certificate or endorsement until availability is confirmed.

For a broader look at common coverage decisions, read our New York small business insurance guide. A thoughtful policy review can make future COI requests quicker while reducing the risk of discovering a gap after a contract is signed.

Frequently asked questions

This article is for general informational purposes only. Coverage availability, terms, exclusions, limits, endorsements and eligibility vary by insurer and policy. A certificate of insurance does not alter coverage. Review your policies and contracts with qualified insurance and legal professionals.

Related guides for Long Island businesses

• Long Island small business insurance guide
• Construction insurance in New York
• Workers’ compensation insurance
• Commercial auto insurance
• Excess liability insurance
• Errors and omissions insurance