The Puerto Rico Court of Appeals recently dismissed a case brought by Elizabeth Castellón Mercado against ASC, a company involved in a contract dispute. The court ruled that it lacked jurisdiction to hear the case, which is significant for both parties and highlights the importance of following proper legal procedures.

The ruling, issued on June 4, 2026, affects Castellón Mercado, who sought to challenge a previous court decision that dismissed her claims against ASC. The court's decision underscores the challenges individuals face when navigating the legal system, especially when previous rulings are involved.

Background

Elizabeth Castellón Mercado is the petitioner in this case, seeking to appeal a decision made by the First Instance Court in Fajardo. Her dispute with ASC centers around a contract issue, which she claims resulted in damages. The case was originally filed in the First Instance Court, where it was dismissed on June 10, 2025.

The First Instance Court ruled that Castellón Mercado's claims were barred by the doctrine of res judicata, meaning the matter had already been decided in a previous case. This earlier case, decided on November 14, 2022, involved the same parties and similar claims regarding illegal dismissal and damages. The court noted that the previous ruling had been confirmed by both the Court of Appeals and the Supreme Court of Puerto Rico.

The Ruling

The Court of Appeals, led by Judge Rodríguez Flores and joined by Judges Cintrón Cintrón and Díaz Rivera, ruled that it did not have jurisdiction to hear Castellón Mercado's appeal. The court stated, "the petition... is merely an attempt to have this Court review a validly issued, final, firm, and unappealable judgment that disposed of all matters raised here." This ruling emphasized that the issues had already been resolved in the prior case.

The court further explained that Castellón Mercado had filed over 35 motions in an attempt to revisit the matter, but these efforts were unsuccessful. The court concluded that the previous judgment constituted res judicata, meaning it could not be challenged again in a different court. The ruling dismissed her appeal based on a lack of jurisdiction and adherence to the relevant court rules.

Impact

This ruling has significant implications for Castellón Mercado and ASC. For Castellón Mercado, the dismissal means she cannot pursue her claims against ASC in this court, effectively ending her legal battle regarding this particular issue. It also serves as a reminder of the importance of understanding legal processes and the consequences of prior rulings.

For ASC, the ruling reinforces the validity of the previous judgment and protects the company from further claims related to this matter. This case highlights the legal principle that once a case has been decided, it cannot be revisited in a different court unless new evidence or circumstances arise. It sets a clear precedent about the limits of appealing decisions in the Puerto Rican legal system.

What's Next

Details were not available in the court filing regarding whether Castellón Mercado plans to appeal this decision further. However, given the ruling's emphasis on jurisdiction and the finality of the previous judgment, it may be challenging for her to pursue additional legal action in this matter.