Laches is an equitable defense that prevents a plaintiff, who "with full knowledge of the facts, acquiesces in a transaction and sleeps upon his rights." The doctrine is defined as "neglect to assert a right or claim which, taken together with a lapse of time and other circumstances" cause "prejudice to the adverse party."
The person invoking laches is asserting that an opposing party has "slept on its rights," and that, as a result of this delay, that other party is no longer entitled to its claim. Put another way, failure to assert one's rights in a timely manner can result in claims being barred by the doctrine of laches.
To sustain a laches defense, a defendant must satisfy three requirements: 1) delay by the plaintiff in filing suit; 2) the delay was unreasonable or inexcusable; and 3) such unreasonable delay was prejudicial to the defendant.
In most contexts, an essential element of laches is the requirement that the party invoking the doctrine has changed its position as a result of the delay. In other words, the defendant is in a worse position now than at the time the claim should have been brought. For example, the delay in asserting the claim may have caused a great increase in the potential damages to be awarded; or assets that could earlier have been used to satisfy the claim may have been distributed in the meantime; or the property in question may already have been sold; or evidence or testimony may no longer be available to defend against the claim.
- ↑ Danjaq LLC v. Sony Corp., 263 F.3d 942, 950 (9th Cir. 2001) (full-text).
- ↑ Wooded Shores Property Owners Ass'n Inc. v. Mathews, 345 N.E.2d 186, 189 (1976) (full-text) appeal after remand, 411 N.E.2d 1206 (1980) (full-text).
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