If you are an employee who lost an employment, retaliation, or wrongful termination, you might be wondering: can I try again in a different court against the same employer? In employment law, and whether your claim involves race/color, gender, gender identity, sexual orientation, national origin, religious, disability, or age, the answer is usually no—because of a powerful rule called res judicata, also known as claim preclusion. Res judicata is Latin for “a matter judged.” In plain English: the issue has already been decided.
It reminds me of playing wiffleball in my front yard growing up. All the kids in the neighborhood would gather in my front yard. Homeplate was a garbage lid. Third base was a big rock. The hedge on the far edge of the law was the homerun wall. There was this one time, my neighbor Alex threw a pitch and I absolutely crushed it—I felt the whack and the ball made that whistling sound wiffle balls make as it rocketed off the bat. I was smiling immediately, knowing the ball was clearing the hedge.
Then—clang—the ball hit the powerline.
It dropped straight down. Derek scooped it up and yelled, “Out.”
The only thing I cared about was the wire. If that ball clears it, it’s gone.
I wanted a do-over.
Didn’t matter. Game over.
That’s how courts treat repeat lawsuits.
Employees often have very real frustrations after losing a case. The judge was unfair. The attorney did not present everything. The evidence was incomplete. I was too busy to help with discovery—but that wasn’t really my fault. If the case had just been handled differently, the result would have changed. We can do better next time.
You get one chance. Courts do not give do-overs.
When the same employee sues the same employer over the same underlying facts—no matter how the claims are framed—courts will shut the case down immediately. That is exactly what happened in Hickman v. Facebook/Meta, 2026 U.S. App. LEXIS 8719.
The employee first filed a federal lawsuit against the employer, which was dismissed with prejudice as a final judgment on the merits. The employee then filed additional lawsuits in other federal courts against the same employer based on the same underlying employment events, even though the claims were framed under different legal theories. Each court dismissed the cases, and the United States Court of Appeals for the Third Circuit ultimately affirmed dismissal of the later action under res judicata because the dispute had already been decided.
This case shows a critical rule in employment law: it is not just about whether your claim is valid—it is about whether you already had your chance to bring it.
Legal Takeaway
The United States Court of Appeals for the Third Circuit held that claim preclusion applies when there is “(1) a final judgment on the merits … (2) the same parties … and (3) a subsequent suit based on the same cause of action.” Once those elements are met, the case is over—even if the employee believes the first decision was wrong.
What Is Res Judicata And Why Does It End Your Case For Good?
Res judicata—also called claim preclusion—is the rule that gives an employee one full and fair opportunity to bring a claim against an employer.
After that, the case is over.
The United States Court of Appeals for the Third Circuit held that “[t]he preclusive effect of a judgment is defined by claim preclusion and issue preclusion, which are collectively referred to as res judicata.” The doctrine applies across employment law—whether the claim involves race, sex, religious, national origin, disability under the ADA, age under the ADEA, or retaliation.
The Third Circuit Court of Appeals further held that claim preclusion applies when three elements exist:
(1) a final judgment on the merits,
(2) the same parties, and
(3) the same cause of action.
If those elements are satisfied, the employee cannot bring the claim again—even in a different court. One and done.
Employees often believe they can fix what went wrong the first time. Maybe the lawyer missed something. Maybe the evidence could have been stronger. Maybe a new email was located that contains racist or sexist comments directly. Maybe a recently fired coworker is now willing to testify that the boss made disability discrimination jokes.
Res judicata does not account for any of that.
It only asks whether the employee already had the opportunity to bring the claim.
And once there is a final judgment, the Third Circuit Court of Appeals recognized that a dismissal with prejudice “operates as an adjudication on the merits” and “ordinarily precludes future claims.”
That is the end of the case.
This is why experienced employment law attorneys matter most at the beginning. The first case is not a test run—it is the case. Every claim under Title VII, the ADA, the ADEA, and related retaliation laws must be identified and developed from the start.
Because once judgment is entered, there is no second chance.
Best Employee’s Rights Lawyer Blogs on Point:
Can I Bring Different Claims Against My Employer In A New Lawsuit?
Short Answer: no—if they come from the same underlying events.
This is where claim preclusion shuts the door, even when employees believe they are bringing a “new” case.
In Hickman, the employee did not just file one lawsuit—she filed multiple. She first sued her employer in federal court. That case was dismissed with prejudice. She filed again in another court. That case was also dismissed with prejudice. Then she filed a third lawsuit, again raising claims of and retaliation.
Same employee. Same employer. Same underlying fact—just with a slightly different twist.
The Third Circuit Court of Appeals held that all elements of claim preclusion were satisfied. There were prior final judgments. The same parties were involved. And all lawsuits were based on the same underlying facts.
Changing the claims did not change the result.
An employee might first bring race and sex claims under Title VII. After losing, the employee might file again alleging national origin, disability under the ADA, age under the ADEA, or retaliation—even FMLA retaliation.
It does not matter.
The Third Circuit made clear that courts look at the “cause of action,” meaning the same underlying events—not the legal labels. If the claims arise from the same employment relationship and the same alleged conduct, they must be brought together the first time.
You cannot split them up and try again.
And the Court of Appeals reinforced the consequence: a dismissal with prejudice means game over. So, when the employee filed again, the result was automatic. Case dismissed. With prejudice.
This is the reality of employment law: you get one case. Not one claim—one case.
That is why experienced employment law attorneys build cases differently from the start. A strong attorney identifies every viable claim—race, sex, national origin, disability, age, retaliation—and develops them together.
Because once judgment is entered, there are no do-overs.
Best Wrongful Termination Attorney Blogs on Point:
FAQ
No. If your claim was already decided on the merits against the same employer based on the same facts, res judicata will bar the new lawsuit.
Does res judicata apply to all types of employment?
Yes. It applies to claims under Title VII, the ADA, the ADEA, and other employment laws, including race, sex, religion, national origin, disability, and age.
Can I bring new legal claims in a second lawsuit?
No. Courts look at the underlying facts, not the legal labels. If the claims arise from the same events, they are barred.
What if my lawyer made mistakes in the first case?
That does not avoid claim preclusion. Courts will not allow a second lawsuit based on the same facts.
Does a dismissal with prejudice mean the case is over?
Yes. It is treated as a final judgment on the merits and prevents future lawsuits based on the same claims.
Can I file in a different court to avoid res judicata?
No. Changing courts does not avoid claim preclusion if the parties and facts are the same.
What Should I Look For In An Employment Lawyer Before Filing My Case?
If you are an employee dealing with, retaliation, or wrongful termination, the most important decision you make may be choosing the right attorney before you ever file your case.
Because you get one shot.
Employment law is unforgiving. If claims under Title VII, the ADA, or the ADEA are missed, or if evidence is not properly developed, claim preclusion can permanently close the door. That is why having the best employment lawyer matters—not just for winning, but for protecting your ability to bring the full case.
Spitz, The Employee’s Law Firm focuses exclusively on representing employees. That focus brings experience, resources, and a deep understanding of how employers defend and retaliation claims. The firm offers free consultations and a no-fee guarantee, allowing employees to pursue claims without financial risk.
More importantly, Spitz approaches each case with strategy and realism. Strong cases are pushed aggressively. Risky cases are evaluated early, with a focus on maximizing outcomes before it is too late.
If you believe your employer violated your rights, do not treat your case like a trial run.
Talk to an employment lawyer who knows how to build your case the right way the first time.
Employment Lawyer Disclaimer
This workplace rights blog provides general information about employment law, including, retaliation, wrongful termination, ADA, ADEA, Title VII, and claim preclusion, and should not be taken as legal advice. Every employee’s situation is different, and you should consult with a qualified employment lawyer or attorney for advice specific to your circumstances. No promises or guarantees are being made about the outcome of any employment, retaliation, or wrongful termination case. This blog is a legal advertisement intended to educate employees about their rights and employer obligations under employment law and reading it does not create an attorney-client relationship.