Upon being notified that the proposals and agreements for assurance named in the charter have been made, and the amount of premiums therein mentioned has been received, the director shall make an examination, or cause one to be made, by some disinterested person specially appointed by him for that purpose; and if it shall be found by himself, or if the person so appointed shall certify, under oath, that agreements have been entered into with said company, and premiums received in the manner and to the amount required by section 376.280, and that the amount required to be paid to said company is held by it in money, notes or bonds, then he shall so certify; and the corporators or officers of such company shall be required to certify, under oath, to the person making such examination, that the money, notes or bonds, or other obligations exhibited to him, have been received on deposit for premiums on bona fide proposals and agreements for insurance.