Ohio Revised Code Title I. State Government § 129.10

Previous to the first day of January and July of each year, the board of commissioners of the sinking fund shall arrange with a reliable banking house as the place where the annual interest on the bonded debt of the state shall be paid. Not more than thirty days prior to the first day of January and July of each year, the board shall convey to such banking house a sufficient amount of money to pay the principal and interest on such bonded debt. For fifteen days before the day of payment of such interest, the board shall give notice of the place of payment by publication in at least one newspaper of general circulation at the seat of government, and by such other means as it deems proper. If such interest is not demanded and paid before the expiration of fifteen days after the date of maturity, the board shall cause the funds remaining in such banking house to be transferred to the state treasury and deposited to the credit of the sinking fund. If the owner of any of the certificates of indebtedness has not received the interest thereon within the time so limited, and desires to obtain it, the amount thereof shall be paid to him, his agent, or attorney, at the office of the board in the manner prescribed by law.