Workplace investigations are a balancing act. On one side is the employer’s obligation to promptly and thoroughly investigate alleged misconduct. On the other is the respondent’s expectation of fairness, and particularly the right to be informed about the allegations against them so they can meaningfully respond. Get that balance wrong, and employers risk claims of procedural unfairness, labor violations, or compromised investigations. Get it right, and investigations are more defensible, more effective, and more likely to withstand scrutiny.
The questions employers routinely face are deceptively simple: how much notice is a respondent entitled to, and when must it be provided? The answer, as with many employment law issues, is “It depends.” The scope and timing of notice vary significantly based on the workplace setting, whether the employee is represented, and whether special statutory protections apply.
Notice as a Baseline Principle
As a general matter, respondents in workplace investigations should receive notice of the allegations against them. Notice allows the employee to understand the claims, provide their version of events, and respond to evidence gathered during the investigation. Without it, the investigation risks appearing one-sided or fundamentally unfair. Allegations can often be described without naming witnesses or disclosing sensitive personal information. Where anonymity is required, respondents can still be told what conduct is alleged, when it is said to have occurred, and why it matters.
That said, notice does not necessarily mean advance notice. In many private-sector, non-unionized workplaces, employers are not required to provide respondents with detailed allegations, or a copy of the complaint, before the respondent’s initial investigatory interview. In fact, there are sound reasons not to do so. Delaying disclosure until the interview allows the investigator to capture the respondent’s unfiltered account and reduces the risk that testimony will be rehearsed or tailored to anticipated evidence.
In 2025, the Civil Rights Department endorsed this approach in its “Harassment Prevention Guide for California Employers.” It is recommended that employers disclose the allegations during the respondent’s interview rather than beforehand. For many employers, this strikes the right balance between fairness and investigative integrity. Consider sharing what is necessary, without sharing what is not.
Represented and Public-Sector Employees
The analysis shifts, sometimes dramatically, when the respondent is a unionized employee, a public-sector employee, a peace officer, or a firefighter. These individuals often are entitled by statute or regulation to “reasonable notice” of the allegations before an investigatory interview takes place. The challenge? None of the governing laws define what “reasonable notice” actually means.
As a result, employers must look to case law, which makes clear that reasonable notice is a fact-specific inquiry. A key decision on this issue is the California Public Employment Relations Board’s 2019 Contra Costa Community College District opinion. There, the Board considered whether an employer was required to provide a copy of the written complaint to the respondent and union prior to the interview. PERB held that employers must provide sufficient detail about the allegations to allow a union representative to meaningfully represent the employee during the interview. Vague statements that an employee may have violated policy are not enough. However, PERB was explicit that reasonable notice does not require providing a copy of the underlying written complaint in advance.
Timing matters, too. Notice must be “timely,” but what that means depends on the circumstances. In Contra Costa Community College District, PERB found that one hour’s notice was sufficient under specific facts presented. However, more serious or complex allegations may require more time. The takeaway for employers is clear: when in doubt, provide more notice, not less, and build in time for the respondent to consult with their representative before questioning begins.
Post-Interview Requests for the Written Complaint
Questions further arise when respondents ask for a copy of the written complaint after they have been interviewed, or after the investigation concludes. Generally speaking, employees are not automatically entitled to receive a copy of the complaint. However, important exceptions apply.
Public-sector employees, peace officers, and firefighters may be entitled to the complaint if the investigation results in disciplinary action. Beyond that, when a union requests a copy of the complaint on behalf of a public-sector employee, the employer cannot simply point to a blanket policy prohibiting disclosure. Instead, the employer must meet and confer with the union in good faith. That does not mean the employer must always produce the complaint in full. Employers may propose redactions, limit the use or dissemination of the document, or otherwise negotiate terms that preserve confidentiality and minimize the risk of retaliation. What employers cannot do is reflexively say, “No.”
Practical Guidance for Employers
Employers navigating respondent notice issues should keep several principles in mind. Early in the process, employers should determine whether the respondent is represented or entitled to special statutory or contractual protections and tailor the investigation accordingly. Where reasonable notice is required, employers should provide concrete information, including the general nature of the alleged misconduct, relevant timeframes, and implicated policies. In non-union settings, it is often appropriate to disclose allegations during the interview rather than beforehand. If notice is given shortly before an interview, employers should allow time for the respondent to consult with a representative upon request. Post-investigation information requests warrant careful consideration, particularly in unionized or public-sector settings, where good-faith discussions are often required rather than rigid reliance on nondisclosure rules.
Some Additional Thoughts
Respondent notice is not a one-size-fits-all requirement. It sits at the intersection of fairness, statutory rights, and investigation strategy. Employers who understand when notice must be given, how much detail is required, and how to respond to requests for complaints are far better positioned to conduct investigations that are not only thorough, but defensible. In an era of heightened scrutiny around workplace investigations, how employers handle notice can matter just as much as the ultimate findings. Thoughtful, tailored approaches protect the integrity of the process, the rights of employees, and the employer itself.