13. When a contract is required to be sealed, a substitute for an actual seal may be used.
14. The Uniform Commercial Code makes no distinction between contracts under seal and other written
contracts for the sale of goods.
15. A certificate of deposit is a negotiable instrument.
16. The law states that a unilateral contract can be formed when performance is started.
17. One may have rights and obligations imposed by law even when no real contract exists.
18. An agreement between two parties to perform an illegal act is a quasi-contract.
19. The legal term for one party benefiting unfairly at the expense of another is unjust enrichment.
20. What is a contract? What are the five definite requirements that every contract must fulfill?
5. In some cases, the contract must meet certain formal requirements, such as being in writing or under seal.