What is the Doctrine of Functos Officio?

Functus officio is a Latin phrase meaning "having performed one's office." In legal practice, it describes an authority, such as that of a judge, arbitrator, or officer, whose mandate has expired because they have already rendered a final decision.

Once a judgment is delivered, the presiding authority loses jurisdiction over the matter and cannot revisit or alter the ruling, ensuring legal finality and preventing endless litigation.

However, limited exceptions exist for correcting clerical errors or "slips of the pen."

In 2026, this doctrine remains a cornerstone of Arbitration Law, preventing parties from seeking unauthorized "clarifications" once a final award has been issued.