An Employee Just Filed a Complaint. Here Is What to Do Next.
The first 48 hours after a complaint determine whether the situation is resolved cleanly or escalates into a lawsuit. Here is the exact process to follow.
Every company eventually receives an employee complaint about harassment, discrimination, hostile work environment, or manager misconduct. Most founders are unprepared for the moment it happens. Mishandling it, even with good intentions, turns a manageable HR situation into a significant legal liability.
The legal framework: why you must respond
When an employee reports harassment, discrimination, or retaliation in good faith, the employer's legal obligation to investigate is not discretionary. Under Title VII, the ADA, the ADEA, and most state equivalents, employers are legally required to take complaints seriously, investigate promptly, and take corrective action where warranted.
The Supreme Court has established that employers can significantly limit their liability for harassment by demonstrating that they had an effective complaint procedure and that the complaining employee used it. The flip side is also true: if you had no complaint procedure, or if you had one but failed to follow it, that failure becomes evidence of negligence.
The two most expensive mistakes employers make after receiving a complaint are: doing nothing (assuming the situation will resolve itself), and retaliating against the complainant. Both are federal violations. Both are common.
The first 48 hours
When a complaint is received, the clock starts immediately. Here is what needs to happen in the first two business days:
- Acknowledge receipt: Tell the complainant that you have received their complaint, that you take it seriously, and that it will be investigated. Do not make promises about the outcome. Do not tell them you believe or disbelieve their account. Simply confirm that the investigation will proceed.
- Document everything immediately: Write down, as specifically as possible, exactly what was reported: who the complainant is, who the respondent is, what conduct was alleged, when and where it allegedly occurred, and who else may have witnessed or have knowledge of it. Note the date and time the complaint was received. This initial record is critical if the situation is later litigated.
- Assess whether interim measures are needed: If the complaint involves physical safety, serious harassment, or conduct that is ongoing, you may need to separate the parties before the investigation is complete. Options include temporary reassignment, a change in reporting structure, a leave of absence, or a change in schedule. The goal is to prevent further harm without appearing to pre-judge the outcome.
- Preserve relevant evidence: Place a litigation hold on any documents, emails, chat messages, performance records, or other materials that may be relevant to the complaint. Do not allow any of this material to be deleted, altered, or moved. If you later face a lawsuit and discoverable evidence was destroyed, even unintentionally, the legal consequences are severe.
Who should investigate
The investigator must be someone who is perceived as neutral, has no direct stake in the outcome, and has the practical authority to conduct confidential interviews and review relevant records. In most small companies, this is the most difficult part of the process.
If the complaint involves a founder, senior executive, or someone the HR lead reports to, the conflict of interest is too great for an internal investigation to be credible. In these situations, bringing in an outside HR consultant or employment attorney to conduct the investigation is not optional; it is how you demonstrate good faith.
The investigator should have no prior relationship with either party that would compromise objectivity, should not be a peer or subordinate of the respondent, and should be someone who can document findings clearly in writing.
Conducting the investigation
A proper investigation typically follows this sequence: interview the complainant first (in full detail), then interview any witnesses, then interview the respondent. Give the respondent a full and fair opportunity to respond to the specific allegations.
Each interview should be documented in detailed notes, reviewed by the interviewer for accuracy, and retained. Do not share one party's statements with the other party during the investigation. Interviews should be conducted privately with no other employees present except a note-taker if needed.
Gather and review all relevant documentary evidence: emails, messages, performance reviews, prior complaints involving the same parties, attendance records, and anything else relevant to the allegations.
The investigation should be completed as promptly as reasonably possible given the complexity of the complaint. A simple one-party complaint with few witnesses can often be completed within one to two weeks. More complex situations may take longer. Unreasonable delay is itself a problem and can be used as evidence that the employer did not take the matter seriously.
Confidentiality: what you can and cannot promise
Employees involved in an investigation will often ask you to keep the matter confidential. You cannot promise complete confidentiality; an investigation by definition requires sharing information with the parties being interviewed. What you can commit to is limiting disclosure to those who need to know in order for the investigation to proceed, and not sharing more than necessary.
Be careful about sweeping confidentiality instructions to employees during an investigation. The National Labor Relations Board has held that blanket orders to employees not to discuss an investigation with coworkers may violate Section 7 rights under the NLRA. If you impose confidentiality requirements, they must be justified by specific legitimate business interests on a case-by-case basis.
Non-retaliation: the obligation that trips up most employers
Retaliation against an employee for making a good-faith complaint is a federal violation and is, statistically, the most common type of charge filed with the EEOC. Retaliation does not require conscious intent. Actions that appear retaliatory, such as a sudden performance review, change in responsibilities, reduction in hours, exclusion from meetings, or termination shortly after a complaint, can all constitute retaliation even if they were already planned.
From the moment a complaint is received, every personnel decision affecting the complainant should be reviewed through the lens of potential retaliation. If you were already planning to put someone on a performance improvement plan, document that the decision was made before the complaint was received. If you need to change their role for legitimate business reasons, document the business rationale thoroughly.
Train managers involved in the situation immediately. Managers often retaliate without realizing it through social exclusion, changed communication, or subtle shifts in how they treat the complainant. The employer is liable for management retaliation even when it is not directed or endorsed by leadership.
After the investigation: findings and corrective action
At the conclusion of the investigation, document your findings in writing. The report should summarize what was alleged, what evidence was reviewed, what conclusions were reached, and what corrective action (if any) is being taken. The report is a protected legal document; treat it accordingly.
If the investigation substantiates the complaint, take corrective action proportional to the severity of the conduct. This might range from additional training and coaching to written warnings, demotion, or termination depending on the facts. Whatever you decide, document the business rationale clearly.
Inform the complainant that the investigation is complete and that appropriate corrective action has been taken. You are not obligated to share the specific disciplinary action taken against the respondent, but you should confirm that the complaint was taken seriously and addressed.
When to call an employment attorney: any complaint involving a senior leader, any complaint that has been escalated to a government agency, any complaint involving physical conduct, and any situation where you are uncertain about the appropriate outcome. The cost of outside counsel for an investigation is small compared to the cost of getting it wrong.