Ohio Rev. Code Ann. § 311.03

When the sheriff, by reason of absence, sickness, or other disability, is incapable of serving any process required to be served, or by reason of interest is incompetent to serve it, the court of common pleas, if in session, or, if not in session, a judge of such court may appoint a suitable person to serve such process or to perform the duties of sheriff during the continuance of such disability. Such appointee shall give such bond as the court or judge requires, conditioned for the faithful performance of his duties, and take the oath of office.