Ohio Rev. Code § 2101.14
All pleadings, accounts, vouchers, and other papers in each estate, trust, assignment, guardianship, or other proceeding, ex parte or adversary, which are filed in the probate court shall be kept together, and upon the final termination or settlement of the case, cause, or proceeding shall be preserved for future reference and examination. The papers shall be properly jacketed, and otherwise tied, fastened, or held together, numbered, lettered, or otherwise marked in such manner that they may be readily found by reference to proper memoranda upon the docket, record, or index entries thereof, which memoranda shall be made by the probate judge, or the papers may be kept, maintained, and indexed as described in section 2101.121 of the Revised Code. Certificates of marriage, reports of births and deaths, and similar papers not part of a case or proceeding, shall be arranged and preserved separately in the order of their dates or in which they were filed. As used in this section "case" or "cause" includes all proceedings in the settlement of any estate, guardianship, or assignment, except as provided in section 2101.141 of the Revised Code.
The probate court shall provide a time stamp and shall stamp on all papers filed in that court the day, month, and year of the filing.
R.C. §2101.14