Ohio Rev. Code § 2325.03: Bona fide purchaser unaffected.

The title to property, which title is the subject of a final judgment or order sought to be vacated, modified, or set aside by any type of proceeding or attack and which title has, by, in consequence of, or in reliance upon the final judgment or order, passed to a purchaser in good faith, shall not be affected by the proceeding or attack; nor shall the title to property that is sold before judgment under an attachment be affected by the proceeding or attack. "Purchaser in good faith," as used in this section, includes a purchaser at a duly confirmed judicial sale.

This section does not apply if in the proceeding resulting in the judgment or order sought to be vacated, modified, or set aside, the person then holding the title in question was not lawfully served with process or notice, as required by the law or Civil Rules applicable to the proceeding.