A legally recognized offer and an acceptance create a "meeting of the minds", or mutual assent, between the parties. A valid contract begins with an offer from a first party.The second party may choose to accept the offer as it stands, making the contract complete. Under the state's law, the following are requirements of a valid contract: An offer;. Acceptance in strict adherence to the terms of the offer;. In order to be viable and legally binding, the terms of the offer should be clearly outlined. The claiming party must prove four elements to show a contract existed. These include proof of the offer, consideration, acceptance, and mutuality. Call us at our San Antonio offices at or fill out our contact form. We're proud to serve clients throughout Texas.