He shall preserve in a permanent form a record of his proceedings, including a concise statement of the result of official examinations of companies.
He shall furnish, upon payment of the fee prescribed by section fourteen, when required for evidence in court, certificates, under seal of the division of insurance, relative to the authority of an insurance agent, broker or company, or an adjuster of fire losses, or an insurance adviser, or a fraternal benefit society, to transact business in the commonwealth on any particular date or for any specified period, and such certificates shall be received by the courts in lieu of the testimony of the commissioner or his representative.