Theories of Liability & Common Defenses
Plaintiff's Theories of Liability
Fraud / Intentional MisrepresentationCiv. Code § 1709; Engalla (1997)
California fraud requires: (1) a false representation of a material fact; (2) knowledge of falsity; (3) intent to defraud; (4) justifiable reliance; and (5) resulting damage. Engalla v. Permanente Medical Group (1997) 15 Cal.4th 951 confirmed the modern elements. Importantly, fraud must be pled with specificity — who said what, when, where, and how. Constructive fraud (breach of a duty arising from a confidential relationship) requires only a departure from duty without corrupt intent.
Intentional Interference with ContractQuelimane v. Stewart Title (1998)
California's interference-with-contract tort does not require an independently wrongful act where an existing contract is at issue — the intentional inducement of breach is itself actionable. Quelimane Co. v. Stewart Title Guaranty Co. (1998) 19 Cal.4th 26. Elements: (1) a valid contract between plaintiff and a third party; (2) defendant's knowledge of the contract; (3) defendant's intentional inducement of breach; (4) actual breach; (5) resulting damages. This includes interference even where defendant acts with a legitimate business motive.
Intentional Interference with Prospective Economic AdvantageDella Penna (1995); Korea Supply (2003)
Unlike interference with contract, interference with prospective economic advantage (IIPEA) requires proof of an independently wrongful act — conduct that is wrongful by some legal measure beyond the interference itself. Della Penna v. Toyota Motor Sales (1995) 11 Cal.4th 376; Korea Supply Co. v. Lockheed Martin (2003) 29 Cal.4th 1134. Independently wrongful acts include violations of statute, common-law torts, and threats of violence — but not legitimate competition.
Trade Secret Misappropriation (CUTSA)Cal. Civ. Code § 3426.1 et seq.
The California Uniform Trade Secrets Act (CUTSA) provides an exclusive state-law trade-secret remedy. A trade secret must be: (1) information that derives independent economic value from being not generally known; and (2) subject to reasonable measures to maintain its secrecy. Misappropriation includes both acquisition by improper means and disclosure or use without consent. CUTSA preempts common-law tort claims based on the same nucleus of facts — CUTSA preemption is one of the most frequently litigated threshold issues.
UCL § 17200 (Unfair Competition)Cal. Bus. & Prof. Code § 17200
California's Unfair Competition Law prohibits any unlawful, unfair, or fraudulent business practice. The three prongs are disjunctive — a plaintiff need only establish one. The UCL allows both injunctive relief and restitution, but not compensatory or punitive damages. After Kwikset Corp. v. Superior Court (2011) 51 Cal.4th 310, UCL plaintiffs must show an economic injury caused by the defendant's unfair practice to establish standing. Representative UCL actions (including private attorney general theories) have been substantially constrained by Prop. 64.
Breach of Fiduciary Duty / Aiding & AbettingCasey v. U.S. Bank (2005)
Business relationships that create fiduciary obligations — joint ventures, close business partners, promoters, controlling shareholders — give rise to fiduciary-duty claims when a party exploits the relationship for personal gain. Third-party advisors who facilitate such breaches face aiding-and-abetting liability under Casey v. U.S. Bank (2005) 127 Cal.App.4th 1138 if they had actual knowledge of the breach and provided substantial assistance. This is a common avenue to reach well-funded institutions involved in a dominant party's misconduct.
Common Defense Theories
Economic Loss RuleErlich v. Menezes (1999); Robinson Helicopter (2004)
The economic loss rule bars tort recovery for purely economic losses arising from a breach of contract, where no independent duty exists in tort. Erlich v. Menezes (1999) 21 Cal.4th 543. However, Robinson Helicopter Co. v. Dana Corp. (2004) 34 Cal.4th 979 carved out an exception: if a defendant made intentional misrepresentations that were independent of and in addition to the contract, tort remedies — including punitive damages — are available even if the underlying dispute sounds in contract. The Robinson carve-out is heavily litigated.
CUTSA PreemptionK.C. Multimedia (2009); Civ. Code § 3426.7
Cal. Civ. Code § 3426.7 displaces all common-law or statutory claims based on the same facts as a CUTSA misappropriation claim. K.C. Multimedia, Inc. v. Bank of America (2009) 171 Cal.App.4th 939. Defendants facing claims for conversion of trade secrets, unjust enrichment, breach of confidence, or common-law misappropriation will move to dismiss on CUTSA preemption. The defense is available regardless of whether the CUTSA claim ultimately succeeds — the question is whether the non-CUTSA claims rest on the same nucleus of facts.
Integration Clause / Written Agreement DefenseCiv. Code § 1625; Parol Evidence Rule
A fully integrated written agreement bars introduction of prior or contemporaneous oral representations that contradict or vary its terms. In fraud cases, defendants argue that a merger/integration clause precludes reliance on pre-contractual statements. California limits the effectiveness of integration clauses against fraud-in-the-inducement claims (Manderville v. PCG&S Group (2007) 146 Cal.App.4th 1486), but they remain a significant defense against negligent misrepresentation and contract-based claims.
Unclean Hands / In Pari DelictoEquity Defense
A plaintiff who engaged in substantially the same misconduct as the defendant may be denied equitable relief under the doctrine of unclean hands. In pari delicto — the in-equal-fault doctrine — applies where the plaintiff was an equal or greater participant in the wrongdoing giving rise to the dispute. This defense is most potent in UCL claims (which are equitable in nature) and partnership/joint-venture disputes where both parties engaged in misconduct.
Trade Secret Reasonable Measures DefenseCiv. Code § 3426.1(d); Whyte v. Schlage (2002)
A plaintiff claiming trade-secret protection must demonstrate it took "reasonable measures" to maintain the information's secrecy. Defendants attack this element by showing the plaintiff shared the alleged trade secrets widely, failed to use NDAs, left the information accessible to departing employees, or disclosed it in marketing materials. Whyte v. Schlage Lock Co. (2002) 101 Cal.App.4th 1443 also rejected the inevitable-disclosure doctrine — California requires actual, not merely threatened, misappropriation.
UCL Standing — Causation & Economic InjuryKwikset v. Superior Court (2011)
Post-Prop. 64, a UCL plaintiff must establish: (1) a loss of money or property; (2) suffered as a result of the defendant's unfair business practice. Kwikset Corp. v. Superior Court (2011) 51 Cal.4th 310. The causation requirement is taken seriously — plaintiffs who cannot show they lost money they would have kept but for the unfair practice lack standing. The UCL is also limited to restitution and injunction, not compensatory damages, which limits its damages value relative to fraud or contract claims.
This analysis is for informational purposes only and does not constitute legal advice. Consult qualified counsel for advice specific to your situation. Attorney advertising.
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