The board of fund commissioners shall require the bank selected as state‘s fiscal agent to transmit to them, within thirty days after payment of any installment of interest or bonds, an exact copy of the account between the bank and the fund commissioners, with an abstract of the coupons or bonds taken up by the bank, and the coupons or bonds. The abstract and coupons or bonds shall be carefully compared by the fund commissioners, and if correct, the fund commissioners shall certify to the fiscal agent the correctness of the abstract, and credit the fiscal agent with the amount of bonds or coupons paid, as shown by the abstract.