Inevitable disclosure doctrine

A legal doctrine — recognized in some states but rejected in others — under which a plaintiff can obtain trade secret protection and injunctive relief by showing that a departing employee will inevitably disclose or use the former employer's trade secrets in the new role, without requiring proof that disclosure has already occurred. California expressly rejects inevitable disclosure; states like Illinois and Pennsylvania apply it with varying stringency. For litigation funders evaluating employee mobility and trade secret cases, the applicable jurisdiction's stance on inevitable disclosure directly affects the availability of injunctive relief and the strength of the misappropriation claim, which in turn affects the defendant's settlement incentives. Cases in inevitable-disclosure-friendly jurisdictions can achieve earlier resolution because defendants face broader injunctive exposure even before evidence of actual use is discovered.

Because the doctrine is unavailable in California and applied inconsistently elsewhere, funders backing employee-mobility trade secret claims first confirm the governing jurisdiction's stance before assuming injunctive relief is available absent proof of actual use — in a rejecting jurisdiction, the entire case must be underwritten on actual-use evidence instead. Where the doctrine is recognized, funders price faster resolution into their duration assumptions, since defendants facing a credible inevitable-disclosure theory often settle to avoid the reputational and operational cost of an injunction before any misuse is proven.