Chapter 13 Tools A B Parol Evidence Rule Rule under which a written contract cannot be charged by prior oral or written agreements. Express Contract Contract in which the agreessment of the parties is spoken or writen. Formal Contract Written contract that must be in a special form to be enforceable. Exeuted Contact Contact that has been fully performed. Simple Contact Any contact that is not a formal contract. Imptied Contact Contact in which intent of the parties is shown by conduct or circumstances. Quasi Contact Obligation that is enforced as if it werwe a contact in order to prevent unjust enrichment of one party. Statute of Frands Law stating that certain agreement s are not enforceable unless they are in writing and are signed by the party against whom the contract is to be enforced. Executory Contact Contact that has not been fully performed. Contact of Adhesion Contact in which the more powerful party dictates all tha important terms.