After-Acquired Evidence: When the Employer Discovers Your Misconduct After Firing You
You were fired for a discriminatory reason. During the lawsuit, the employer discovers that you lied on your resume — or committed some other misconduct the employer didn’t know about when it fired you. The employer argues this misconduct justifies the termination retroactively. California law says: it doesn’t justify it, but it may limit your damages.
The after-acquired evidence doctrine addresses a specific scenario: the employer fires the employee for an unlawful reason, and during litigation — through discovery, through investigation, through a background check the employer never conducted — the employer discovers evidence of employee misconduct that it did not know about at the time of the termination.
The employer argues: “If we had known about this, we would have fired her anyway — so the termination was justified.” The employee responds: “You didn’t know about it. It played no role in the decision. The termination was discriminatory.”
Both statements may be true. The law’s resolution balances them.
The California rule
The California Supreme Court addressed the after-acquired evidence doctrine in Salas v. Sierra Chemical Co. (2014) 59 Cal.4th 407. The court held that after-acquired evidence of employee misconduct does not bar the discrimination claim entirely — because the employer’s unlawful motive at the time of the termination is the violation, and the employee’s later-discovered misconduct does not retroactively cure it.
However, the after-acquired evidence may limit the remedies. If the employer proves that it would have terminated the employee upon discovering the misconduct — that the misconduct was serious enough to warrant termination and that the employer would have acted on it — the employee’s damages may be cut off as of the date the employer discovered the evidence.
This means: the employee can prove discrimination and recover damages for the period between the unlawful termination and the date the employer discovered the misconduct. But the employee may not recover damages for the period after the discovery — because the employer would have terminated the employee at that point anyway.
How it works in practice
The employee is fired in January for what she believes is age discrimination. She files a lawsuit. During discovery in September, the employer reviews the employee’s personnel file and discovers that the employee falsified her educational credentials on her original application — a fact the employer did not know at the time of the termination.
The employer moves to dismiss the case, arguing the falsified credentials justify the termination. The court applies the after-acquired evidence doctrine: the discrimination claim survives, because the employer’s motive in January was unlawful. But the employee’s back pay damages may be limited to the January-September period — because the employer can prove it would have terminated the employee in September upon discovering the falsification.
The employee still recovers: compensatory damages for the period of unlawful termination, emotional distress damages, and potentially punitive damages for the employer’s discriminatory conduct. But the back pay recovery is capped at the discovery date.
What this means for employees
The after-acquired evidence doctrine does not eliminate the employee’s case. It limits the remedies in a specific way — and only if the employer can prove that the misconduct was serious enough that it would have resulted in termination.
Minor misconduct does not trigger the doctrine. An employer that discovers the employee occasionally used the office printer for personal documents has not discovered misconduct that would have resulted in termination. The after-acquired evidence must be serious — falsification of credentials, theft, fraud, or comparable conduct that the employer can credibly claim would have been a termination-level offense.
The employer must prove it would have acted. The employer cannot simply point to the misconduct and assert it would have fired the employee. It must demonstrate that it consistently terminates employees for the same type of misconduct — that the misconduct triggers termination under the employer’s actual practices, not just under a policy the employer has never enforced.
The doctrine does not bar emotional distress or punitive damages. Even when back pay is limited, the employee may recover emotional distress damages for the full period of the discriminatory conduct and punitive damages for the employer’s unlawful motive. These damages are not dependent on the duration of back pay.
What employees should know
An employee who has something in their background that the employer might discover during litigation — a credential that was exaggerated, a prior employment that was omitted, conduct that the employer did not know about — should disclose it to their attorney immediately.
The attorney needs to know because the after-acquired evidence defense is predictable — the employer will look for it, and the attorney must prepare for it. An attorney who is surprised by after-acquired evidence in the middle of litigation is at a significant disadvantage. An attorney who knows about it from the beginning can factor it into the strategy, the damages calculation, and the settlement negotiation.
The disclosure is protected by attorney-client privilege. The attorney cannot share it. But the attorney needs to know it — because the after-acquired evidence will come out eventually, and the case is stronger when the attorney has planned for it.
If your employer discovers misconduct after firing you — misconduct it did not know about when it made the decision — the discovery does not erase the discrimination. The after-acquired evidence may limit your back pay, but the claim survives. The employer’s unlawful motive at the time of the termination is the violation, and later-discovered evidence does not retroactively justify it.
This article is general information about California law and is not legal advice. Every situation turns on its particular facts.