Ohio Rev. Code § 2109.18
A surety of a fiduciary or the executor or administrator of a surety may make application at any time to the probate court to be released from the bond of such fiduciary. Such surety shall file a written request therefor with the probate judge of such court and give at least five days' notice in writing to such fiduciary. If, upon the hearing, the court is of the opinion that there is good reason therefor, it shall release such surety. The death of a surety shall always be good cause.
A fiduciary may make application at any time to the court for the release of the fiduciary's sureties. Such fiduciary shall file a written request therefor with the judge of such court and give at least five days' notice in writing to such sureties. If, upon the hearing, the court is of the opinion that there is good reason to release such sureties, it shall order the fiduciary to file an account, as provided by section 2109.301, 2109.302, or 2109.303 of the Revised Code, and such sureties shall be released after the fiduciary files a new bond which is approved by the court.
If such fiduciary fails to give new bond as directed, the fiduciary shall be removed and the fiduciary's letters of appointment superseded. Such original sureties shall not be released until the fiduciary gives a bond, but shall be liable for such fiduciary's acts only from the time of executing the original bond to the filing and approval by the court of the new bond.
The costs of such proceeding shall be paid by the surety applying to be released, unless it appears to the court that the fiduciary is insolvent, incompetent, or is wasting the assets of the estate.
R.C. §2109.18