Proof of damages is an essential element to any claim for breach of contract. The plaintiff has the “burden of proving with reasonable certainty the amount of damages and the cause from which they resulted.” (See Sunrise Continuing Care, LLC v. Wright, 277 Va. 148, 156 (2009)). A fundamental feature of our legal system is that the party bringing the litigation must produce the evidence needed to support the claims. Defendants generally aren’t required to produce any evidence at all. The rule sounds innocuous but can be unforgiving in practice. In Virginia, a plaintiff seeking monetary relief must prove not only liability but the amount of its damages with reasonable certainty. Sometimes, the defendant is in sole possession of the relevant financial data, making it difficult (if not impossible) for a plaintiff to prove its case. According to a recent decision of the Virginia Supreme Court, rules are rules; they can’t be broken as a matter of equity or convenience.
In the case of Appian Corp. v. Pegasystems, Inc., a jury returned a verdict exceeding $2 billion after finding that a competitor had misappropriated trade secrets through what the record described as sustained corporate espionage. That massive judgment did not survive appellate review. Although the evidence was deemed sufficient to support the jury’s finding of trade secret misappropriation, the trial court had improperly instructed the jury that the defendant bore the burden of proving which portions of its profits were untainted by the misappropriation. That instruction reflected a widely accepted national approach to trade-secret damages. But it was held to be inconsistent with controlling Virginia law.
The Virginia Business Litigation Blog

