Ohio Rev. Code § 5309.14
Immediately after the filing of the application to register the title to land or to any interest therein, the probate court or the court of common pleas shall enter an order referring it to one of the examiners of titles, who shall search the records and investigate all facts stated and all allegations made in the petition, or otherwise brought to his notice. Such examiner shall investigate particularly whether the land or any part thereof is occupied by, or is in the possession, actual or constructive, of any person other than the applicant and if so, by whom, the nature of the occupation or possession, and by what right; and whether the boundaries and monuments or objects called for marking such land, as shown by the record title, appear to be reasonably certain and definite. Such examiner shall file in the case a report on his investigation, concluding with a certificate of his opinion upon the title and the necessity for a resurvey of the land and giving the names, residences, and post-office addresses, if known or ascertainable by reasonable diligence, of any persons in addition to those named in the petition which in the opinion of the examiner are necessary or proper parties to a complete determination of the case and to the settling and determination by the court of all apparent or real interests in or liens or charges upon the lands described in the application or any part thereof. Such persons shall be made additional parties defendant to the application by amendment or by order of the court before the publication of the notice provided for in section 5309.15 of the Revised Code. The examiner may require the applicant to file with him affidavits or other evidence relating to the title. Every report of an examiner shall be based upon a personal inspection and examination of the record or of a certified copy of the record of every instrument or proceeding affecting the title to said land for a period of at least seventy-five years prior to the filing of the application if the record title extends back that far. The clerk of the probate court or the clerk of the court of common pleas shall give notice to the applicant or his attorney of the filing of such report. If the opinion of the examiner is adverse to the applicant, such applicant shall, except in cases provided for in section 5309.66 of the Revised Code, be allowed a reasonable time by the court in which to elect to proceed further or to withdraw his application. The election shall be made in writing and filed with the clerk.
R.C. §5309.14