In the Philippines, the right to security of tenure is a constitutionally protected guarantee enshrined in Article XIII, Section 3 of the 1987 Constitution and reinforced by Article 279 of the Labor Code of the Philippines (Presidential Decree No. 442, as amended). This provision declares that no employee shall be terminated from employment except for just or authorized causes and after observance of due process. Illegal dismissal occurs when an employer terminates an employee without a valid cause or without complying with the procedural requirements of law. The topic of termination for “alleged mistreatment” sits squarely within this framework, raising critical questions about whether an accusation of mistreatment—such as verbal abuse, physical assault, harassment, bullying, or other forms of improper conduct toward co-employees, subordinates, clients, or third parties—constitutes a lawful ground for dismissal or renders the termination illegal.

Legal Framework Governing Dismissal

The Labor Code classifies the grounds for termination into two broad categories: (1) just causes under Article 297 (formerly Article 282), which are attributable to the fault or negligence of the employee, and (2) authorized causes under Article 298 (formerly Article 283), which are based on business or operational necessities and do not require employee fault. Mistreatment allegations almost invariably fall under just causes, particularly the ground of “serious misconduct or willful disobedience by the employee of the lawful orders of his employer or representative in connection with his work.”

Department Order No. 147-15 issued by the Department of Labor and Employment (DOLE) further elaborates the rules on termination, emphasizing that just causes must be proven by the employer with substantial evidence. The Supreme Court has consistently held that the employer bears the burden of proving both the existence of the just cause and compliance with due process; failure on either count results in a finding of illegal dismissal.

Serious Misconduct as a Ground for Dismissal

For mistreatment to qualify as a just cause, it must satisfy the three elements of serious misconduct established by jurisprudence:

It must be of a grave and aggravated character;
It must relate to the performance of the employee’s duties; and
It must render the employee unfit to continue working for the employer.

Examples of mistreatment that have been recognized as serious misconduct include:

Physical violence or assault against a co-employee, supervisor, or customer within or outside the workplace when connected to employment;
Severe verbal abuse, threats, or defamation that undermines workplace harmony or the employer’s reputation;
Sexual harassment or gender-based mistreatment, which may also trigger liability under Republic Act No. 7877 (Anti-Sexual Harassment Act) and Republic Act No. 11313 (Safe Spaces Act);
Bullying or repeated psychological harassment that violates company policies aligned with DOLE guidelines on workplace conduct; and
Willful damage to company property or mistreatment of clients that results in loss of business or trust.

Mere negligence or minor infractions do not rise to the level of serious misconduct. Isolated incidents of rudeness or heated arguments, without aggravating circumstances, are generally insufficient to justify termination. The misconduct must be “serious”—meaning it must be so grave as to amount to a betrayal of the trust reposed by the employer or a direct threat to the safety and order of the workplace.

The “Alleged” Nature of the Charge: Burden of Proof and Sufficiency of Evidence

The word “alleged” is pivotal. An employer cannot lawfully dismiss an employee based solely on an unproven accusation. Labor cases are decided on the basis of substantial evidence—the amount of relevant evidence that a reasonable mind might accept as adequate to justify a conclusion. This is a lower threshold than proof beyond reasonable doubt required in criminal cases, yet it still demands concrete proof.

The employer must present:

Eyewitness accounts or affidavits;
Video recordings or documented complaints;
Medical certificates (in cases of physical mistreatment);
Internal investigation reports showing an impartial inquiry; and
Corroborating evidence that the act was committed by the employee.

Mere complaints or anonymous reports, without corroboration, are ordinarily insufficient. The Supreme Court has repeatedly struck down dismissals where the only basis was a single, uncorroborated allegation. Conversely, when the employer presents clear and convincing evidence—such as a security camera footage of an employee striking a colleague or documented repeated harassment—the dismissal is upheld as valid.

Procedural Due Process: The Twin-Notice Requirement

Even when a valid just cause exists, the dismissal is illegal if procedural due process is not observed. DOLE Department Order No. 147-15 and long-standing jurisprudence mandate the following steps:

First Written Notice – The employer must serve a written notice specifying the particular acts or omissions constituting the ground for dismissal (e.g., “You are charged with serious misconduct for allegedly assaulting your co-employee on [date] at [place]”). The notice must give the employee at least five (5) calendar days to submit a written explanation and must inform the employee of the right to be heard.
Opportunity to Be Heard – This may be done through a written submission or a face-to-face hearing or conference where the employee can present evidence, witnesses, and defenses. The employee may be assisted by a representative or counsel.
Second Written Notice – After evaluating the explanation and evidence, the employer must issue a written notice of the decision to dismiss, stating the facts and the specific ground relied upon.

Failure to follow any of these steps—even when just cause exists—renders the dismissal illegal. The Supreme Court has described due process in labor cases as “not a mere formality” but a substantive right.

Management Prerogative and Its Limits

Employers enjoy a wide latitude in exercising management prerogative, including the right to discipline and dismiss employees. However, this prerogative is not absolute. It must be exercised in good faith, without abuse, and must not be used as a subterfuge for illegal dismissal. Courts scrutinize whether the penalty of dismissal is commensurate with the offense. For first-time or minor instances of mistreatment, a suspension or written warning may be the appropriate penalty rather than outright termination, unless company policy explicitly provides otherwise and such policy is reasonable.

Authorized Causes and Retrenchment Overlap

Although mistreatment is a just cause, employers sometimes attempt to mask an illegal dismissal by citing authorized causes such as retrenchment or redundancy. When evidence shows that the real reason is the alleged mistreatment, courts will pierce the veil and declare the dismissal illegal. The two grounds are mutually exclusive in character: just causes focus on employee fault; authorized causes do not.

Consequences and Remedies for Illegal Dismissal

When a dismissal for alleged mistreatment is declared illegal, the employee is entitled to the following remedies under Article 279 of the Labor Code:

Reinstatement to the former position without loss of seniority rights, or separation pay equivalent to one month’s salary for every year of service (in lieu of reinstatement when the relationship is strained);
Full backwages computed from the time compensation was withheld up to the time of actual reinstatement;
Other benefits that would have accrued during the period of illegal dismissal (13th-month pay, service incentive leave, etc.);
Moral and exemplary damages plus attorney’s fees when the dismissal is attended by bad faith, fraud, or oppressive conduct; and
Interest at the legal rate on all monetary awards.

The National Labor Relations Commission (NLRC) and the labor arbiters have original and exclusive jurisdiction over illegal dismissal cases. Appeals go to the Court of Appeals via Rule 65 petition and ultimately to the Supreme Court.

Special Considerations in Specific Sectors

Certain industries or employee classifications carry additional nuances:

Managerial employees may be dismissed more readily on the ground of loss of trust and confidence under Article 297, even for less serious mistreatment, because they occupy positions of trust.
Probationary employees may be dismissed for failure to qualify, but mistreatment allegations must still meet due-process standards.
In the public sector, civil service rules and the Administrative Code apply alongside the Labor Code, often requiring a formal administrative investigation before dismissal.
Unionized employees may invoke grievance machinery under the collective bargaining agreement before termination proceeds.

Preventive Measures for Employers

To minimize the risk of illegal dismissal claims arising from mistreatment allegations, employers are advised to:

Maintain clear, written policies on workplace conduct, anti-harassment, and disciplinary procedures;
Conduct regular training on acceptable behavior;
Document all complaints and investigations meticulously;
Ensure impartiality in internal investigations; and
Consult legal counsel before issuing termination notices.

Conclusion

An employee may lawfully be terminated for mistreatment only when the employer proves by substantial evidence that the misconduct is serious, work-related, and renders continued employment untenable, and only after full compliance with the twin-notice due-process requirements. A mere allegation, no matter how serious, is never enough. Philippine labor jurisprudence has consistently tilted in favor of the employee’s security of tenure, reflecting the constitutional policy of protecting labor. Employers who act hastily or without evidence risk substantial monetary liability, reinstatement orders, and reputational damage. Conversely, employees who genuinely commit grave acts of mistreatment cannot shield themselves behind the mantle of illegal dismissal once the employer meets its evidentiary and procedural burdens. The balance struck by the Labor Code and the Supreme Court ensures that workplace discipline is maintained without sacrificing the fundamental right to due process and security of tenure.