Ohio Rev. Code § 2111.141
The court, by order or rule, may require that any inventory filed by a guardian pursuant to section 2111.14 of the Revised Code be supported by evidence that the inventory is a true and accurate inventory of the estate of the ward of the guardian. The evidence may include, but is not limited to, prior income tax returns, bank statements, and social security records of the ward or other documents that are relevant to determining the accuracy of the inventory. In order to verify the accuracy of an inventory, the court may order a guardian to produce any additional evidence that may tend to prove that the guardian is in possession of or has knowledge of assets that belong to the estate of the ward and that have not been included in the guardianship inventory. The additional evidence may include, but is not limited to, the guardian's income tax returns and bank statements and any other documents that are relevant to determining the accuracy of an inventory. The court may assign court employees or appoint an examiner to verify an inventory filed by a guardian. Upon appointment, the assigned court employees or appointed examiner shall conduct an investigation to verify the accuracy of the inventory filed by the guardian. Upon order of the court, the assigned court employees or appointed examiner may subpoena any documents necessary for the investigation. Upon completion of the investigation, the assigned court employees or appointed examiner shall file a report with the court. The court shall hold a hearing on the report with notice to all interested parties. At the hearing, the guardian shall have the right to examine and cross-examine any assigned court employees or appointed examiner who conducted the investigation and filed the report that is the subject of the hearing. The court shall charge any costs associated with the verification of an inventory filed by a guardian against the estate of the ward, except that, if the court determines that the guardian wrongfully withheld, or aided in the wrongful withholding, of assets from the inventory filed by the guardian, the court shall charge the costs against the guardian.
R.C. § 2111.141