This article explains how contracts can be formed through conduct, communication, and performance — even without a signature — under common law, equity, and the UCC. It highlights how real estate and auto sales can become legally binding when an offer is made, payment is tendered, and the other party accepts by silence or action. Citing UCC §§ 2-204, 2-206, and 1-103, the article shows how equity enforces what "ought to be done" when formalities are absent but intent and performance are clear.