An action upon a contract not in writing, express or implied, shall be brought within four years after the cause of action accrued. Under Ohio law, a person receiving unrequested merchandise may keep it without payment.Contracts consist of three elements: offer, acceptance and consideration. The offer must be communicated to either the buyer or the seller. Contract and promissory estoppel always require a promise. But sometimes promises can be enforceable even if they are not made in written form, and even if they do no come in the form of a contract. In the absence of a contract, however, a promise usually can't be enforced at law. But there is an exception. Requires all oral promises to be included in the written contract. Prohibits sellers from making misrepresentations about the business opportunity.