Secondary Picketing — Ontario Employment Law
Related Keywords
About Secondary Picketing
Secondary picketing occurs when striking or locked-out workers establish a picket line at a location other than the workplace of their direct employer. Unlike primary picketing, which takes place directly at the employer's gates, secondary picketing targets third parties connected to the employer. This could include suppliers, distributors, retail outlets selling the employer's goods, public warehouses, or even the corporate parent company.
In Ontario, the legality of secondary picketing is fundamentally shaped by the common law and the Canadian Charter of Rights and Freedoms. Historically, courts often restricted secondary picketing because it dragged neutral third parties into labour disputes. However, modern legal principles treat secondary picketing as a protected form of freedom of expression. Unionised workers generally have the right to peacefully convey information and seek public sympathy anywhere, including outside a third-party business.
Yet, this right is not absolute. Ontario courts apply the "wrongful action model." This means secondary picketing is lawful unless it involves independent tortious or criminal conduct. If picketers engage in nuisance, trespassing, violence, intimidation, or actively blocking employees and delivery vehicles from entering a neutral site, the picketing crosses from lawful expression into unlawful interference. Additionally, courts will examine if a targeted third party is truly neutral; if a third party acts as an "alter ego" or ally by doing the struck employer's work, courts may grant picketers wider latitude.
When unlawful conduct occurs, the affected third party can apply to the Ontario Superior Court of Justice for an interim or interlocutory injunction to restrict or prohibit the picketing. Because granting an injunction in a labour dispute involves strict statutory requirements and balances constitutional rights against a company's commercial interests, the outcomes rely heavily on the specific nuances of the dispute. Organizations or unions caught in these challenging situations should always seek customized advice from a seasoned labour lawyer to clearly understand their legal standing.
Frequently Asked Questions
What is the difference between primary and secondary picketing?
Primary picketing happens at the physical premises of the employer involved in the labour dispute. Secondary picketing happens at other locations, such as the businesses of neutral suppliers, vendors, or the corporate parent company, to exert economic pressure on the primary employer.
Is secondary picketing legal in Ontario?
Yes, it is generally considered a lawful exercise of freedom of expression under the Charter. However, it only remains legal if the picketing is peaceful and does not involve unlawful acts like trespassing, physical intimidation, or property damage.
Can striking workers completely block access to a third-party business?
No. Picketers at a secondary location are entitled to peacefully communicate their message, but they cannot legally barricade entrances, trap vehicles, or prevent neutral employees and customers from accessing the business.
How can a neutral business stop disruptive secondary picketing?
If picketers are committing unlawful acts that cause irreparable harm, the third-party business can apply to the court for an interlocutory injunction. To succeed, the business must provide strong evidence that the picketers are engaging in wrongful conduct beyond mere communication.
What is an 'alter ego' employer in the context of secondary picketing?
An 'alter ego' or ally is a third party that heavily inserts itself into the labour dispute, often by performing the struck work on behalf of the primary employer. If a court finds a business is an ally rather than a neutral party, they may be subject to the same picketing pressures as the primary employer.
At what point should a third-party business contact a lawyer about a picket line?
Management should consult a labour lawyer the moment a secondary picket line begins to disrupt operations or escalate beyond peaceful information sharing. Securing an injunction requires acting quickly and gathering precise, well-documented evidence of unlawful interference.
Common Scenarios
- Unionized factory workers go on strike and deploy some members to a public warehouse where the factory's inventory is stored, distributing leaflets to warehouse staff and drivers about the ongoing dispute.
- During highly contentious collective bargaining, employees of a subsidiary company travel to the downtown headquarters of their parent corporation, loudly protesting and temporarily delaying executives from entering the building.
- A striking carpenters' union sets up a picket line at a massive retail construction site where their direct employer is merely one subcontractor, attempting to persuade workers from completely separate, neutral trades to walk off the job in solidarity.
What You Should Know
- If your business becomes the target of a secondary picket line, immediately start thoroughly documenting the event with time-stamped video and detailed incident logs, especially focusing on blocked access or aggressive behaviour.
- Union organizers planning a secondary picket should carefully instruct members that their goal is strictly to communicate and persuade, not to physically obstruct or intimidate anyone at the neutral site.
- Recognize that attempting to circumvent a strike by having a third-party partner perform the striking members' duties can strip that third party of its 'neutral' status, opening it up to more aggressive picketing.
- Because the boundary between lawful Charter expression and actionable nuisance is complex, never attempt to physically force picketers off public property without first obtaining an injunction drafted by qualified legal counsel.
Featured Cases
Purolator Inc. v. Canadian Union of Postal Workers
2025 ONCA 565 (CanLII) · 2025-07-30Secondary Picketing as Labour Dispute
This is a motion to quash an appeal to the Court of Appeal from a motion judge's interim injunction orders regarding secondary picketing. The parties were Purolator Inc. and the Canadian Union of Postal Workers, whose members picketed a Purolator facility while on strike against Canada Post. The motion judge granted an injunction under general rules, deciding that secondary picketing was not a labour dispute under section 102 of the Courts of Justice Act. The Court of Appeal determined that the broad statutory definition of a labour dispute encompasses secondary picketing, meaning section 102 governed the original injunction. As a result, the union's right to appeal directly to the Court of Appeal stands, and the employer's motion to quash the appeal was dismissed.
Purolator Inc. v. J.D. et al.
2024 ONSC 6812 (CanLII) · 2024-12-06This is an interlocutory proceeding concerning the appropriateness of granting an ex parte injunction against union members engaged in secondary picketing at third-party premises. The court addressed whether section 102 of the Courts of Justice Act applies to such picketing, the distinction between primary and secondary picketing, and the application of common law nuisance principles in the context of labour disputes.
Purolator Inc. v. J.D. et al.
2024 ONSC 6696 (CanLII) · 2024-11-30Secondary Picketing Injunction: Private Property Access
This is an interlocutory proceeding concerning an application for an interim injunction to stop secondary picketing at a private property. The court addressed whether obstructing entry and exit from a logistics facility constitutes unlawful conduct justifying injunctive relief and whether section 102 of the Courts of Justice Act applies to secondary picketing by non-employees.
Service Corporation International (Canada) v. Service Employees International
2013 ONSC 4894 (CanLII) · 2013-07-22This is a procedural ruling concerning jurisdiction in a labour law dispute involving secondary picketing and the issuance of injunctions.
Lower Lakes Towing Ltd v. United Steelworkers Local 1005
2011 ONSC 3668 (CanLII) · 2011-06-10Unlawful Secondary Picketing: Interim Injunction Granted
This is an interlocutory proceeding where the applicant sought an interim injunction to prevent interference with its ships entering and leaving Hamilton Harbour due to protestors obstructing a bridge. The court addressed whether the obstruction constituted unlawful secondary picketing, applying the Supreme Court of Canada's decision in Pepsi-Cola, and granted the injunction while correcting a misnomer in the respondent's name.
Ledcor Industries Ltd. v. Sheet Metal Workers' International Ass.
2004 CanLII 16548 (ON SC) · 2004-01-23This is an interlocutory proceeding concerning the principles governing the grant of an injunction in the context of secondary picketing by a trade union.
Interforest Ltd. v. W.
1999 CanLII 15028 (ON SC) · 1999-09-29Picketing at Private Residences: Injunction Granted
This is an interlocutory proceeding concerning a labour dispute where striking employees engaged in picketing at the private residences and drop-off sites of managerial and non-managerial employees. The court addressed whether such residential picketing constituted secondary picketing or unlawful interference with property rights, balancing workers' rights to free expression against employees' privacy rights. An injunction was granted to limit picketing within 500 feet of employees' homes to protect their privacy and prevent harassment, but denied for drop-off sites.
683481 Ontario Ltd. v. B.
1990 CanLII 8063 (ON SC) · 1990-08-16Labour Dispute: Alter Ego & Secondary Picketing
This is an interlocutory proceeding concerning an application for an interim injunction in the context of a labour dispute. The court addressed whether the plaintiff was an alter ego of Stelco, thereby participating in the labour dispute, and whether the defendants' picketing constituted unlawful secondary picketing. The court denied the injunction, finding that a labour dispute existed and the picketing was lawful.
Canadian Pacific Ltd. v. Weatherbee et al. Canadian Pacific Ltd. v. P. et al.
1979 CanLII 1727 (ON SC) · 1979-08-10Secondary Picketing: Labour Dispute Definition
This is a merits decision regarding secondary picketing by employees of a subsidiary at the premises of their parent company. The court addressed whether the picketing constituted a 'labour dispute' under section 20 of the Judicature Act and whether the provincial legislation was ultra vires as applied to federally regulated undertakings. The court held that the definition of a labour dispute is broad enough to include secondary picketing and that the provincial legislation was valid, resulting in a decision that injunctions should not issue.
Ford Motor Co. of Canada Ltd. v. M. et al.
1978 CanLII 1488 (ON SC) · 1978-06-06Secondary Picketing: Labour Dispute Definition
This is an interlocutory proceeding concerning an application for an injunction to restrain secondary picketing. The court addressed whether the picketing of a neutral third party's premises constituted a 'labour dispute' under section 20(1) of the Judicature Act, ultimately holding that the plaintiff was outside the economic context of the dispute and that section 20 did not apply.
Ford Motor Co. of Canada Ltd. v. B. et al.
1978 CanLII 1391 (ON SC) · 1978-04-21This is a procedural ruling concerning labour relations, specifically addressing issues of picketing and secondary picketing under the Judicature Act.
Neumann and Young Ltd. v. O. et al.
1974 CanLII 850 (ON SC) · 1974-10-15This is an interlocutory proceeding regarding an ex parte injunction application against union members engaged in secondary picketing at a public warehouse operator's premises. The court addressed whether the picketing constituted a 'labour dispute' under the Judicature Act and whether the warehouse premises qualified as a 'place of business' of the struck employer.
Al Sugar Contracting & Excavating Ltd. v. C. et al.
1974 CanLII 766 (ON SC) · 1974-09-24Secondary Picketing Injunction: No Direct Labour Dispute
An interlocutory proceeding in which the applicant sought an interim injunction to restrain a union from secondary picketing at a construction site. The court examined whether a 'labour dispute' existed under the Judicature Act given that no carpenters were employed on site, and determined the picketing was unlawful and caused irreparable harm, granting the injunction.
Dominion Auto Transit Co. Ltd. v. C. et al.
1974 CanLII 701 (ON SC) · 1974-08-15Labour Dispute: Secondary Picketing and Interim Injunction
A case involving a labour dispute over secondary picketing, where employees of one company picketed a third-party company's premises without any direct relationship or bargaining dispute. The court examined whether the plaintiff was entitled to relief for unlawful interference with its operations and interpreted the meaning of 'labour dispute' under the Judicature Act. The court granted an interim injunction due to irreparable harm caused by the picketing.
Commonwealth Holiday Inns of Canada Ltd. v. S. et al.
1974 CanLII 587 (ON SC) · 1974-02-21Secondary Picketing: Injunction Dismissed in Labour Dispute
This is an interlocutory proceeding regarding an application for an injunction to restrain union picketing. The court found that the picketing was directly connected to a lawful labour dispute between the union and the employer, leading to the dismissal of the motel owner's application.
Inglis Ltd. v. R. et al.
1974 CanLII 579 (ON SC) · 1974-02-14Labour Law: Secondary Picketing and Ex Parte Injunctions
This is an interlocutory proceeding concerning an ex parte application for an injunction to restrain picketing. The court addressed whether picketing at a different plant of the same employer constitutes secondary picketing or an act in connection with a labour dispute, and whether an injunction could be granted ex parte under the Judicature Act.
Domtar Chemicals Ltd. v. L. et al. (No. 2)
1973 CanLII 405 (ON SC) · 1973-07-31Secondary Picketing Injunction: Labour Relations Case
This is an interlocutory proceeding concerning an injunction granted to restrain secondary picketing by striking employees at a separate plant unrelated to their labour dispute. The court found that the picketing caused irreparable harm to the business operations of the unaffected entity and induced a breach of the collective agreement.
Nedco Ltd. v. N. et al.
1973 CanLII 470 (ON SC) · 1973-06-13Secondary Picketing: Injunction Application Dismissed
This is an interlocutory proceeding regarding an application for an injunction to stop secondary picketing at the plaintiff company's premises. The court examined whether the plaintiff was a real party to the dispute with the struck company and whether the statutory requirements for an injunction under section 20 of the Judicature Act were met, specifically regarding irreparable harm and police assistance.
J.S. Ellis & Co. Ltd. v. W. et al.
1972 CanLII 540 (ON SC) · 1972-10-02Secondary Picketing Injunction: No Direct Labour Dispute
This is an interlocutory proceeding where the plaintiff sought an injunction to restrain secondary picketing by union members who were protesting government policy by interfering with the unloading of a ship. The court granted the injunction, holding that secondary picketing is unlawful in the absence of a direct labour dispute and that freedom of speech does not justify such interference with the plaintiff's business interests.
CTV Television Network Ltd. v. K. et al.
1972 CanLII 665 (ON SC) · 1972-04-13Secondary Picketing: Ex Parte Injunctions & Unlawfulness
This is a procedural ruling regarding ex parte injunctions in the context of secondary picketing. The court addressed whether section 20(2) of the Judicature Act prohibits such injunctions, found no labour dispute between the plaintiff and defendants under section 20(1), and deemed secondary picketing unlawful per se. It also determined that a Local Judge had jurisdiction to grant and later rescind the injunction due to emergency circumstances and lack of notice.