Conn. Gen. Stat. § 31-348: Compensation insurance companies to report their risks.

Every insurance company writing compensation insurance or its duly appointed agent shall report in writing or by other means to the chairperson of the Workers' Compensation Commission, in accordance with rules prescribed by the chairperson, the name of the person or corporation insured, including the state, the day on which the policy becomes effective and the date of its expiration, which report shall be made within fifteen days from the date of the policy. The cancellation of any policy so written and reported shall not become effective until fifteen days after notice of such cancellation has been filed with the chairperson. Any insurance company violating any provision of this section shall be fined not less than one hundred nor more than one thousand dollars for each offense.