Oklahoma The Requirement of Consideration (also known as the "Oklahoma Statute of Frauds") is a statutory provision requiring certain contracts to be in writing in order to be legally enforceable. This law applies to contracts for real estate, marriage settlements, sale of goods of $500 or more, and any contract that cannot be completed within one year. There are certain exceptions to this law such as for verbal contracts regarding the sale of goods under $500 or for a contract to pay a debt that is already due. The primary types of Oklahoma The Requirement of Consideration are: 1. Real estate contracts 2. Marriage settlements 3. Sale of goods of $500 or more 4. Any contract that cannot be completed within one year 5. Exceptions for verbal contracts regarding the sale of goods under $500 or to pay a debt that is already due.