Ohio Rev. Code § 6117.10
Any person, firm, or corporation desiring to appeal to the probate court as provided in section 6117.09 of the Revised Code, when the improvement is located in two or more counties, may appeal to the probate court of the county in which property of such appellant to be assessed for such improvement is located.
Any person, firm, or corporation desiring to appeal from the final order or judgment of the board upon any of the questions mentioned in such section, shall on or before the date of the passage of the improvement resolution give notice in writing of an intention to appeal, specifying therein the matters to be appealed from. The board shall fix the amount of the bond to be given by the appellant, which amount shall be reasonable, and shall make an entry thereof upon its journal. The appellant within ten days thereafter shall file with the county auditor a bond in the amount so fixed with sureties to be approved by the auditor, and such bond shall be conditioned to pay all costs made on the appeal if the appellant fails to sustain such appeal or the same is dismissed.
R.C. § 6117.10