A Valid Offer And Acceptance: A real estate contract in Washington must feature specific actions that demonstrate offer and acceptance. We are in Washington State, where we are required to sign buyer-buyer agent contract before buying anything.However, we didn't sign. A contract provision is unenforceable if it is deemed unconscionable. While many types of contracts exist, below is a brief list of the types that may be used at the university. No, it can be implied. If the acceptance is shown through conduct, the same would be considered as a valid acceptance. The general rule is that contracts do not need to be in writing. The exception would be the contracts falling under the statute of frauds. If there is no acceptance, there is no contract.