Ohio Rev. Code Ann. § 2950.031
(A)
(2) At any time on or after July 1, 2007, and not later than December 1, 2007, the attorney general shall send to each offender or delinquent child who prior to December 1, 2007, has registered a residence, school, institution of higher education, or place of employment address pursuant to section 2950.04, 2950.041, or 2950.05 of the Revised Code a registered letter that contains the information described in this division. The registered letter shall be sent return receipt requested to the last reported address of the person and, if the person is a delinquent child, the last reported address of the parents of the delinquent child. The letter sent to an offender or to a delinquent child and the delinquent child's parents pursuant to this division shall notify the offender or the delinquent child and the delinquent child's parents of all of the following: