Former employee cannot re-litigate withdrawn claim: res judicata bars identical complaints

This case shows the strict consequences of withdrawing an employment tribunal claim. The former employee had brought a claim against her former employer, but later withdrew it. The tribunal issued a judgment dismissing the claim under Rule 52, which expressly states that the claimant may not bring a further claim raising the same or substantially the same complaint.

Despite this, the former employee presented a new claim raising identical complaints of unfair dismissal, discrimination, and non-payment of payments. At the hearing, she confirmed the claims were the same as those in the earlier case. The tribunal had no choice but to strike out the new claim for lack of jurisdiction.

What the respondent did right

The respondent's counsel identified the earlier judgment and brought it to the tribunal's attention. This allowed the tribunal to apply the clear legal bar under Rule 52. The respondent did not need to defend the merits of the claim.

What the claimant could have done differently

The former employee could have avoided this outcome by not withdrawing the original claim, or by expressly reserving the right to bring a further claim at the time of withdrawal. She could also have sought legal advice before withdrawing. Once the Rule 52 judgment was issued, the door was firmly closed.

Why this matters

This decision reinforces the finality of tribunal judgments following withdrawal. Claimants should understand that withdrawing a claim is not a neutral step — it can permanently bar re-litigation of the same issues. Employers can rely on Rule 52 to prevent stale or repeated claims from proceeding.