Ohio Rev. Code § 1701.67: Using facsimile signatures.

When any note, bond, or other evidence of indebtedness of a corporation is authenticated or countersigned by an incorporated trustee, the signature of any officer of the corporation authorized to sign any such instrument may be facsimile, engraved, stamped, or printed. Although any officer of the corporation whose manual or facsimile signature is affixed to any such instrument ceases to be such officer before the instrument is delivered, such instrument nevertheless shall be effective in all respects when delivered.