Duress consists of any wrongful act that coerces another person to enter a contract that he or she would not have entered voluntarily. Blackmail, physical violence, a show of force, and threats to institute legal proceedings in an abusive manner may all constitute sufficient duress to void a contract. However, a defendant claiming duress must demonstrate that sufficient harm was threatened or inflicted to justify finding that the defendant had no reasonable choice but to enter the contract on the terms dictated by the plaintiff.