501 CMR, § 9.02
In the case of a lost or stolen firearm license issued pursuant to the provisions of M.G.L. c 140, §§ 129B, 131, 131F or 131H, the licensing authority shall issue a new license at no cost to the license holder. A person seeking a license under 501 CMR 9.00 must have an active and valid license and must have reported such license lost or stolen to the Criminal History Systems Board and to the local issuing licensing authority prior to seeking a new license. In connection with an application for a new license to replace the lost or stolen license, the licensing authority shall confirm the applicant's identity and update its files as the licensing authority deems necessary prior to issuing a new license. The licensing authority, in consultation with the Criminal History Systems Board, shall issue a new license with a term coterminous with the original license period.
501 CMR, § 9.02