Contrary to what many people believe, there is no automatic right to cancel a legally binding contract once there has been a valid offer and acceptance. Unless an offer specifies otherwise, an offer can be accepted through the mail.Under Florida law, a contract may be binding on a party despite the absence of a party's signature. Getting ready to write an offer for a house? In this video, I show you how to fill out the As-Is contract to purchase a home. You cannot form a valid contract in Florida without consideration. Both parties must give "consideration" for a contract to be formed. A written contract is made under Florida law when the three elements of contract formation are present. No matter whether a contract is orally made or put into writing, every contract must have certain elements in order to be enforceable in court. Contract Defenses: Even after you have a valid offer, acceptance, and consideration, you still may not have an enforceable contract.