Ohio Rev. Code § 1729.20: Methods of giving notice - signed waiver.

(A) Whenever notice is required by this chapter to be given to any person, the notice may be given personally, by mail, or by electronic or telephonic transmittal. If mailed, the notice is given when it is deposited in the United States mail, with postage prepaid, addressed to the person at the person's address as it appears on the records of the association. If notice is sent by electronic or telephonic transmittal, notice is given when an electronic or telephonic confirmation of delivery is received by the association.

(B) A signed waiver is equivalent to personal notice to the person signing. The waiver may be signed at any time.