Under Article 297 (a) of the Labor Code, an employer may validly dismiss an employee for Serious Misconduct. Misconduct is defined as improper or wrong conduct; it is a transgression of some established and definite rule of action, a forbidden act, or a dereliction of duty.

However, the Supreme Court has repeatedly cautioned that not every behavioral infraction warrants the ultimate penalty of dismissal. To serve as a valid ground for termination, the misconduct must satisfy strict, overlapping statutory criteria:

• It must be serious: The act must be of such grave and aggravated character that it severely undermines the relationship between the employer and the employee.
• Connection to Work: The misconduct must relate directly to the performance of the employee’s duties, rendering them unfit to continue working for the enterprise.
• Wrongful Intent: The act must be performed with a deliberate, wrongful, and perverse attitude, showing a clear disregard for established workplace decorum (e.g., sexual harassment, assault on a supervisor, or blatant theft of company property).

Evidentiary Onus: The burden of proof rests entirely on the employer. Management must present substantial, objective evidence (such as CCTV logs, audit trails, or signed witness statements) to prove the act took place. General suspicions or raw hearsay will fail before a Labor Arbiter.