The voluntary payment doctrine provides an affirmative defense to a claim for the recovery of money that a plaintiff voluntarily paid. The duress/coercion exception to the voluntary payment doctrine requires the plaintiff show no reasonable alternative to payment existed. Additionally, the defense of property exception requires the plaintiff show an imminent risk of losing the property.
Valiente, Michael, "Summary of Nevada Ass’n. Servs. v. Eighth Jud. Dist., 130 Nev. Adv. Op. 94" (2014). Nevada Supreme Court Summaries. 837.