Ohio Rev. Code Ann. § 4719.07
(E) No telephone solicitor who receives payment in any form from a purchaser without also receiving a signed, written confirmation that complies with divisions (F) and (G) of this section shall fail to do all of the following within five business days after the receipt of the payment:
(F) A confirmation under this section shall include, but not be limited to, all of the following:
(H) A telephone solicitor that meets all of the following requirements is exempt from the provisions of divisions (A) through (G) of this section:
(4) The telephone solicitor provides to the purchaser two copies of a written notice of cancellation rights which contains the following printed in a type size of a minimum of ten points, in a color clearly contrasting with all background: