Ohio Rev. Code § 5309.23
If the probate court or the court of common pleas after a hearing in a land registration case finds that the applicant has title in whole or in part as stated in his application, and proper for registration, then to the extent of the title so found a decree of confirmation and registration shall be entered, which shall have the effect of a decree in rem and, subject only to the exceptions stated in section 5309.28 of the Revised Code, shall bind the land and all interests and rights therein and liens and charges thereon. After the expiration of the time for appeal and except as otherwise provided in sections 5309.02 to 5310.21, inclusive, of the Revised Code, such decree of confirmation and registration shall be absolutely conclusive against all persons, including the state or any political subdivision thereof, whether mentioned by name in the application, notice, or other papers in the case, or as unknown heirs and devisees, or included in the general description "all other persons, if any, having any right or interest in or lien upon the lands or any part thereof," and whether under disability, not in being, unknown, or unascertained. After the expiration of the time for appeal, except as otherwise provided in such sections, no such person shall in any of the courts of this state assert by suit or otherwise any claim to an interest in or lien or charge upon registered land in derogation of or contrary to the purport of such decree. Such decree shall not, after the expiration of the time for appeal, be opened because of the absence, infancy, or other disability of any person affected thereby, or by any suit or proceeding at law or in equity for opening up judgments or decrees because a party has not had actual notice of the suit or proceedings. Any person deprived of land or of any interest therein or lien or charge thereon by a decree of registration obtained by fraud may file a petition in the case to open up and review such case within one year after the entry of the decree, provided no innocent purchaser for value, mortgagee, or other lien holder has acquired an interest. If there is any such purchaser, mortgagee, or other lien holder, the decree of registration shall not as to them or any person holding under them be opened, but shall remain in effect forever, subject only to the right of appeal. Any person who is aggrieved by such decree may pursue his remedy by action of tort against the applicant or against any other person for fraud in procuring the decree.
R.C. §5309.23