Third-party harassment is a form of workplace harassment where the harasser is not a direct employee of the organization. Instead, the harasser is an outside individual (such as a customer, client, vendor, contractor, or business partner) whose conduct creates a hostile or intimidating work environment. Organizations carry a legal and ethical responsibility to address third-party harassment, even when the source falls outside their direct workforce.

What Is Third-Party Harassment?

Third-party harassment occurs when an employee faces harassment from someone outside the organization during the course of their work. This includes unwelcome conduct based on a protected characteristic (such as sex, race, religion, national origin, age, disability, or sexual orientation) that is severe or pervasive enough to interfere with the employee’s ability to perform their job.

The harasser’s status as a non-employee does not reduce the employer’s responsibility. If a company knows, or reasonably should know, that a third party is harassing its employees, it must take action. Inaction can expose the organization to significant legal liability.

Third-party harassment can occur in any industry. It is especially common in customer-facing roles such as retail, healthcare, hospitality, financial services, and field-based environments.

What Are Examples of Third-Party Harassment?

Third-party harassment takes many forms across different workplace settings. Common examples include:

• A client making sexually suggestive comments to a sales representative during meetings or calls, or sending inappropriate messages through email or professional platforms
• A vendor using racial slurs or making discriminatory remarks directed at an employee during a site visit or business interaction
• A customer repeatedly targeting an employee with unwanted physical contact, such as touching or blocking their path, in a retail or service environment
• A contractor displaying offensive materials (such as discriminatory imagery or explicit content) in a shared workspace or job site
• A patient or client making threatening or demeaning statements to a healthcare or social services worker based on their gender, race, or religion
• A business partner sending harassing communications via email, text, or social media targeting an employee based on a protected characteristic
• A delivery driver or service technician making offensive jokes or gestures repeatedly when visiting a workplace location
• Online harassment from clients or customers directed at employees through professional networking platforms or company-facing channels

In each of these cases, the harassing conduct originates outside the organization’s direct employment relationship, yet directly impacts the employee’s work experience.

Who Is Liable If Harassment Comes from a Third Party?

Liability depends on what the employer knew and what actions they took. Under federal law (including Title VII of the Civil Rights Act) and many state anti-discrimination laws, employers can face liability for third-party harassment when:

• The employer knew or should have known about the harassing conduct, and
• The employer failed to take prompt and appropriate corrective action

Courts and the EEOC consistently hold that employers must maintain a harassment-free workplace, even when the harasser is a non-employee. The degree of control the employer has over the third party (such as the ability to end a vendor contract, remove a client from an account, or restrict worksite access) is a key factor in determining liability.

Employers who fail to investigate complaints, ignore the situation, or discourage reporting face significant legal exposure. Many states also impose obligations that go further than federal law in protecting employees from non-employee harassment.

What Are the Responsibilities of Employers When It Comes to Third-Party Harassment?

Employers have clear responsibilities when harassment comes from outside the organization. The law expects them to act. Core responsibilities include:

1. Establish a clear anti-harassment policy. Policies must explicitly address third-party harassment. Employees need to know they are protected from harassing conduct regardless of its source, and that they can use the same reporting channels for third-party complaints.

2. Train employees and managers. Managers and HR professionals must treat third-party harassment with the same seriousness as internal harassment. Training should include third-party scenarios so employees and supervisors can identify and respond to them.

3. Create accessible reporting mechanisms. Employees in customer-facing roles may hesitate to report harassment from clients or vendors, fearing it could affect business relationships. Employers must communicate clearly: reporting is encouraged, and retaliation will not be tolerated.

4. Investigate promptly and thoroughly. Treat every third-party complaint as seriously as an internal one. Gather facts, interview relevant parties, and document findings.

5. Take appropriate corrective action. Corrective action will vary based on the situation and the employer’s relationship with the third party. Options include:

• Removing the employee from interactions with the third party
• Issuing a formal warning to the vendor, client, or contractor
• Terminating the business relationship
• Restricting the third party’s access to the workplace

6. Follow up with the affected employee. Check in to confirm the harassment has stopped. Verify that no retaliation has occurred.

What Steps Should Employees Take in the Event of Third-Party Harassment?

Harassment from a client, customer, or vendor can feel complicated, especially when that relationship carries business value. Employees should know they have the right and the means to report it.

1. Report it, even if you’re unsure. No employee should tolerate harassing behavior to protect a business relationship. Report the conduct to your manager, HR, or through your organization’s anonymous reporting channel.
2. Document the incidents. Record dates, times, locations, and descriptions of the conduct. Note any witnesses. If the harassment occurred digitally (via email, text, or messaging platforms), preserve screenshots or records.
3. Be specific in your report. Describe exactly what happened, how often, and how it affected your work. Specific details help employers investigate and act quickly.
4. Know that retaliation is prohibited. Reporting harassment is a protected activity. An employer cannot penalize you for raising a good-faith complaint. This includes removing you from a desirable account or punitive reassignment.
5. Escalate if needed. If your internal report does not lead to action, file a charge with the Equal Employment Opportunity Commission (EEOC) or your state’s equivalent agency.
6. Seek support. Harassment affects mental health and workplace safety. Reach out to your organization’s Employee Assistance Program (EAP) or a trusted support resource.

Why Choose Traliant’s Harassment Prevention Training?

Third-party harassment is one of the most nuanced and underaddressed areas of workplace compliance. Generic training rarely covers it well. Traliant does.

Traliant’s harassment prevention training covers the full spectrum of workplace harassment, including real-world scenarios involving clients, vendors, customers, and contractors. An in-house legal team develops the content. It reflects how harassment actually happens today, not hypothetical situations employees can’t relate to.

With Traliant, your organization gets:

• Legal expertise you can trust. Our training is written and updated by employment law professionals to reflect current federal and state requirements.
• Real-world scenarios employees recognize. Cinematic, Netflix-style storytelling brings third-party harassment to life and drives genuine behavior change.
• Training built for every role. From frontline employees to managers and HR leaders who need to know how to respond.
• New episodes added annually. Workplace laws and workforce dynamics change. So does our content.
• An innovative, scalable platform. Micro reels, AI-powered translations, interactive decision paths, and seamless deployment across your entire organization.
• A true compliance partner. Unmatched responsiveness and support from implementation through ongoing administration.

Equip your managers, HR team, and employees with the knowledge and tools to recognize, report, and respond to third-party harassment effectively.

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