Ohio Rev. Code § 3107.062
The department of job and family services shall establish a putative father registry. To register, a putative father must complete a registration form prescribed under section 3107.065 of the Revised Code and submit it to the department. The registration form shall include the putative father's name; the name of the mother of the person he claims as his child; and the address or telephone number at which he wishes to receive, pursuant to section 3107.11 of the Revised Code, notice of any petition that may be filed to adopt a minor he claims as his child.
A putative father may register at any time. For the purpose of preserving the requirement of his consent to an adoption, a putative father shall register before or not later than fifteen days after the birth of the child. No fee shall be charged for registration.
On receipt of a completed registration form, the department shall indicate on the form the date of receipt and file it in the putative father registry. The department shall maintain registration forms in a manner that enables it to access a registration form using either the name of the putative father or of the mother.
R.C. § 3107.062