Homeowners, beware: nobody should step on your jobsite without a Certificate of Insurance which has been checked and verified! If you are doing business with a service company that will be working on your premises, you should first make certain that the company has sufficient liability insurance. If work will be performed by the company's owner himself, without other employees, a general liability policy is sufficient. However, if the owner has employees that will be working onsite, workers' compensation insurance is required.
The best way to obtain the Certificate is to have the service company's insurance broker forward the Certificate to you. The Certificate should name you, with the jobsite address, as the Certificate Holder and should name you as the "additional insured." This Certificate will give you proof that coverage is valid, as well as provide you with protection for yourself and 3rd parties in the event a 3rd party sues you due to negligence of the contractor. It will also inform you of the amount of insurance coverage provided so you may determine whether or not the coverage is sufficient for your needs. (For more information, contact your insurance broker.)