Illegal Strike as a Cause for Loss of Employment Status
A strike is a protected concerted activity only when it is based on a lawful labor dispute, declared by the proper labor organization, observed through the statutory process, and carried out by lawful means. When the strike is illegal, the Labor Code allows the loss of employment status of employees who fall within the classes made individually liable by law.
Illegal strike is not an authorized cause in the same sense as installation of labor-saving devices, redundancy, retrenchment, closure, or disease, because those causes arise from business necessity or employee condition and ordinarily carry separation pay. Illegal strike operates as a special statutory ground for termination arising from unlawful concerted activity, and the employer must prove both the illegality of the strike and the employee's own legally relevant participation.
The doctrine protects two interests at the same time: workers retain the constitutional and statutory right to engage in peaceful concerted activities, while the employer is not required to retain union officers or employees who knowingly participate in an illegal strike or in illegal acts committed during a strike.
When a Strike Is Illegal
The illegality of a strike may arise from its objective, the party that called it, noncompliance with mandatory procedure, disregard of an assumption or return-to-work order, or the unlawful manner in which the strike is carried out. The defect need not appear in every aspect of the strike; a strike lawful in purpose may still become illegal because of procedure, timing, or means.
| Source of illegality | Controlling rule | Employment significance |
|---|---|---|
| Illegal objective | A statutory strike must be connected with a labor dispute, ordinarily a bargaining deadlock or an unfair labor practice dispute. | A work stoppage over purely intra-union, inter-union, political, personal, or non-strikeable issues is not protected as a lawful strike. |
| Improper party | The right to declare a strike belongs to a legitimate labor organization acting for the bargaining unit. | A wildcat strike, or a stoppage called by persons without authority to bind the union, may be treated as illegal. |
| Procedural defect | Notice of strike, the applicable cooling-off period, strike vote by secret ballot, and strike-vote report are mandatory requirements. | Substantial sympathy for the cause does not cure noncompliance with mandatory strike procedure. |
| Assumption or certification order | When the Secretary of Labor assumes jurisdiction or certifies the dispute for compulsory arbitration, strikes and lockouts over the dispute are automatically enjoined. | Continuing, commencing, or resuming the strike despite the order is a prohibited activity and may justify loss of employment status for those legally liable. |
| Illegal means | Peaceful picketing is protected, but violence, coercion, obstruction, intimidation, sabotage, and defiance of lawful orders are not. | Even a strike with a lawful objective may expose participants to dismissal when they knowingly commit illegal acts during the strike. |
Grounds for a Lawful Strike
A lawful strike is generally confined to a bargaining deadlock or unfair labor practice. A bargaining deadlock exists when the parties, after bargaining in good faith, reach an impasse over negotiable terms of employment. An unfair labor practice strike responds to employer conduct that violates the employees' right to self-organization, collective bargaining, or other protected concerted activity.
A no-strike clause in a collective bargaining agreement ordinarily bars economic strikes over issues covered by the agreement, but it does not automatically bar a strike against serious unfair labor practices that strike at the union's existence or the employees' protected rights. The label used by the union is not controlling; the substance of the dispute determines whether the strike has a lawful objective.
A strike based on a good-faith belief that the employer committed unfair labor practice is not made illegal merely because the unfair labor practice is later found unproved. Good faith, however, does not validate a strike that disregards mandatory procedure, violates an assumption order, or uses unlawful means.
Mandatory Strike Procedure
The notice of strike gives the government an opportunity to conciliate, the cooling-off period gives the parties time to settle, the strike vote confirms that the bargaining unit supports the strike, and the strike-vote report gives the State final notice before the work stoppage begins. These steps are not empty formalities because a strike can paralyze property rights, business operations, employment, and public interest.
For bargaining deadlocks, a longer cooling-off period applies; for unfair labor practices, a shorter period applies; and in union-busting situations involving dismissal of union officers that threatens the union's existence, the law dispenses with the ordinary cooling-off period. The strike-vote report period remains independently mandatory because it is the last statutory restraint before the strike may lawfully proceed.
A strike vote must be by secret ballot and must be approved by the required majority of the total union membership in the bargaining unit, not merely by those who attend a meeting. The vote requirement prevents a small militant group from exposing the entire bargaining unit to the consequences of a strike without collective authorization.
Assumption of Jurisdiction and Return-to-Work Orders
In industries indispensable to national interest, the Secretary of Labor may assume jurisdiction over the dispute or certify it for compulsory arbitration. The order has a coercive legal effect: workers must return to work, the employer must readmit them under the same terms existing before the strike, and both sides must submit the dispute to compulsory resolution.
Defiance of an assumption, certification, or return-to-work order is treated with particular severity because it challenges the State's power to maintain industrial peace in a dispute impressed with public interest. Knowledge of the order may be shown by direct receipt, union notices, public announcements, actual participation in meetings, or circumstances showing that the employee could not plausibly claim ignorance.
Persons Who May Lose Employment Status
The illegality of the strike and the liability of an individual employee are distinct inquiries. A strike may be illegal, but dismissal does not automatically follow for every employee who appeared at the picket line. The employer must identify the employee, establish the employee's status or acts, and connect the proof to the statutory consequence.
| Employee involved | Rule on loss of employment status | Required proof |
|---|---|---|
| Union officer | A union officer who knowingly participates in an illegal strike may be declared to have lost employment status. | Proof of union office, knowledge, and participation in the illegal strike. |
| Union member or rank-and-file employee | Mere participation in an illegal strike does not by itself justify dismissal. | Proof that the employee knowingly participated in illegal acts during the strike. |
| Any worker, including a union officer | Knowing participation in illegal acts during a strike may result in loss of employment status. | Substantial evidence identifying the employee and the specific illegal act or acts committed. |
| Employee who defies a return-to-work order | Deliberate refusal to comply may constitute an illegal act connected with the strike. | Proof of the order, notice or knowledge, and unjustified noncompliance. |
Union Officers
Union officers are held to a stricter standard because they lead the collective action, influence the members, and are expected to know the legal requirements for a strike. Their knowing participation in an illegal strike is enough to support loss of employment status, even without proof that each officer personally committed violence or obstruction.
The employer must still prove that the employee was in fact a union officer and that the officer knowingly participated in the illegal strike. Officer status is not presumed from active attendance at the picket line, loud support for the strike, or membership in the bargaining unit. The relevant proof may include union records, election results, appointment documents, strike committee designations, minutes, notices, or admissions.
Knowledge is a factual matter. It may be inferred from the officer's role in preparing the notice, calling meetings, conducting the strike vote, signing strike communications, receiving government orders, leading picket activities, or continuing the strike after being informed of its legal defect.
Ordinary Union Members and Rank-and-File Employees
For ordinary union members, the law draws a protective distinction between joining an illegal strike and committing illegal acts during a strike. Mere presence at the picket line, chanting, carrying placards, or refusing to work during the strike does not automatically justify dismissal unless accompanied by proof of knowing participation in illegal acts.
This distinction recognizes that members often rely on union leadership in deciding whether to join a strike. Without individualized proof, mass dismissal would convert the illegality of a collective action into automatic forfeiture of employment, which the law does not permit.
Ordinary members may still be dismissed when they knowingly commit or join illegal acts, including violence, intimidation, blocking entry or exit, preventing willing employees from working, destroying property, occupying company premises, threatening customers or suppliers, or deliberately defying a valid return-to-work order.
Illegal Acts During a Strike
Illegal acts are not limited to crimes charged in court. In labor law, the relevant question is whether the employee's conduct destroyed the protected character of the concerted activity or violated statutory restraints on strike conduct.
- Violence and threats. Physical assault, threats of bodily harm, harassment of non-strikers, and coercive conduct against supervisors, customers, guards, or replacement workers are incompatible with peaceful concerted activity.
- Obstruction. Blocking ingress to or egress from company premises, forming human barricades that prevent free movement, or stopping vehicles and goods may constitute illegal acts even if no physical injury results.
- Intimidation and coercion. Workers may persuade others to join the strike, but they may not use force, fear, or intimidation to compel participation or prevent work.
- Damage to property. Sabotage, destruction of equipment, tampering with machinery, or seizure of company premises exposes the actors to dismissal and possible civil or criminal liability.
- Defiance of lawful orders. Refusal to obey an assumption, certification, injunction, or return-to-work directive may be treated as an illegal act when the employee had notice and no lawful excuse.
- Prohibited strike forms. Sit-down strikes, slowdowns, work slowdowns disguised as compliance, intermittent stoppages, and occupation of premises may be illegal because they withhold work while retaining control over the employer's property or operations.
Peaceful picketing remains lawful when it communicates the workers' grievance without coercion, obstruction, or violence. The line is crossed when picketing is used not merely to inform or persuade, but to physically prevent business operations or compel action through unlawful pressure.
Proof and Individualized Liability
The employer bears the burden of proving a valid cause for dismissal by substantial evidence. General allegations that employees joined an illegal strike, unsigned lists of supposed participants, or broad references to crowd behavior do not satisfy the requirement of individualized liability.
Evidence should identify the employee and the act relied upon. Photographs, videos, affidavits, police reports, security logs, attendance records, government orders, union documents, and admissions may be relevant, but they must be evaluated for reliability and must connect the named employee to the conduct charged.
Group liability may be recognized only when the evidence reasonably shows that the identified employees knowingly joined the same illegal act, such as a barricade, violent dispersal, or collective defiance of a return-to-work order. It is not enough that an employee belonged to the union or was seen near the picket line at some point during the strike.
Relation to Employer Disciplinary Procedure
Because dismissal for illegal strike depends on employee conduct, status, knowledge, and participation, the employer must observe procedural due process before terminating employment. D.O. No. 147, s. 2015 reflects the basic separation between substantive due process, which requires a valid cause, and procedural due process, which requires fair notice and opportunity to be heard.
The employee should receive a written charge identifying the illegal strike or illegal acts relied upon, the facts connecting the employee to the charge, and the possible consequence of dismissal. The employee must be given a meaningful opportunity to explain, present evidence, and contest identification, knowledge, participation, or justification.
A final notice of decision should state the facts established, the rule applied, and the reason dismissal or a lesser penalty is imposed. A mass termination notice that simply declares the strike illegal is vulnerable because it fails to show the employee-specific basis for loss of employment status.
Preventive suspension may be used only when the employee's continued presence poses a serious and imminent threat to the life or property of the employer or co-workers. It is a temporary protective measure, not a shortcut to dismissal or a substitute for proof.
Consequences of Valid and Invalid Dismissal
When the employer proves the illegality of the strike and the employee's statutory liability, the employee may be validly dismissed and is not entitled to reinstatement, backwages, or separation pay as a matter of right. The dismissal rests on unlawful conduct connected with the strike, not on a business-authorized cause that carries statutory separation benefits.
When the employer proves that the strike was illegal but fails to prove that a particular rank-and-file employee committed illegal acts, that employee should not be dismissed solely on the basis of membership or attendance. The employee remains subject to the ordinary consequences of the strike, including the no work-no pay rule for the strike period, but not to automatic loss of employment status.
When the strike is lawful, dismissal for mere participation in the strike violates the workers' right to engage in protected concerted activity. The affected employees may be entitled to reinstatement and backwages, subject to the usual limits arising from actual work stoppage, valid defenses, supervening events, and proof of loss.
If the strike was caused or prolonged by the employer's unfair labor practice, the no work-no pay principle may yield to the remedial objective of making employees whole. The wage consequences therefore depend on the reason for the work stoppage, the legality of the strike, and the employer's own conduct.
Settlement, Amnesty, and Quitclaims
Strike disputes are often resolved through return-to-work agreements, amnesty clauses, settlement payments, or quitclaims. These instruments are valid only when voluntarily executed, supported by reasonable consideration, and free from fraud, coercion, mistake, or unconscionable terms.
An amnesty or settlement may waive disciplinary action if its terms clearly cover the employees and acts involved. Conversely, a quitclaim does not validate a dismissal unsupported by proof of individual liability, and it cannot defeat statutory rights when the waiver is involuntary, ambiguous, or grossly inadequate.
The practical effect of a settlement depends on its language. A return-to-work agreement may preserve employment while settling the strike dispute; a compromise may release monetary claims; and a valid quitclaim may bar later claims within its scope. None of these devices should be presumed to waive rights or liabilities that the document does not clearly and fairly address.