Ohio Rev. Code § 5815.15: Notice of release.

No fiduciary or other person having the possession or control of any property subject to a power of appointment, other than the donee or holder of such power, has notice of a release of the power until a copy of the release is delivered to the fiduciary or other person having possession or control.

No purchaser or mortgagee of real property subject to a power of appointment has notice of a release of the power until a copy of the release is delivered to the officer charged by law with the recording of deeds in the county in which the property is situated. If the property is in this state, the county recorder to whom a release is delivered shall record the release in the official records, and shall charge a fee computed in the same manner as the fee charged for recording deeds.