Who are the andover companies? We at The Andover Companies - a group of affiliated, jointly managed insurance companies named above - are committed to protecting the privacy of our customers and the confidentiality of their personal information.How do i contact the home office in andover? Give Us A Call At any one of Andover's Home Office numbers: (978) 475-3300 (800) 225-0770How do i make a claim with andover companies? The Andover Companies is an agency-based insurance firm, which means all claims start with a quick report to your independent insurance agent. 1. REPORT Report the loss to your insurance agent. Your local agent will initiate the claims process once you provide the details of your claim.Why has the andover company returned my payment? The Andover Companies may return payments that have been made through the Policy Portal for various reasons. These may include, but are not limited to: the insurance policy number is not valid or cannot be located, the policy has been cancelled, or the premium has already been paid in full.