Ohio Rev. Code Ann. § 1334.06
(A) Every agreement selling or leasing a business opportunity plan shall be in writing and a copy of the executed agreement and all other documents the seller requires the purchaser to sign shall be given to the purchaser at the time they are signed. The agreement shall contain at least the following:
(D) In connection with the sale or lease of a business opportunity plan, no seller shall:
(5) Fail or refuse to honor any valid notice of cancellation by a purchaser and within ten business days after receipt of the notice to: