Send a short, dated email that says what happened, who did it, when, who saw it, and that you want it to stop. Keep it factual and avoid conclusions and threats. Send it from an account you will still have after you leave, and save a copy outside company systems. A written report fixes the date of your protected activity.
In this guide
Why writing beats a conversation
A hallway conversation leaves no record that it happened. An email does. That matters for two separate reasons.
First, it puts the employer on notice. The EEOC's guidance frames employer liability around whether the employer "reasonably tried to prevent and promptly correct the harassing behavior" and whether the employee "unreasonably failed to take advantage of any preventive or corrective opportunities provided by the employer." A dated report is the cleanest answer to that second question.
Second, it fixes the date you engaged in protected activity. Everything about a retaliation claim is measured from that date. If a schedule change or a first-ever bad review lands two weeks after your email, the sequence is visible. If your report was verbal, the employer's version is that it never happened.
The EEOC also encourages employees to "report harassment to management at an early stage to prevent its escalation." Early is better for the case and, more importantly, better for you.
Sources [1]
What to put in it
Six things, in plain language. What happened, described concretely. Who did it. When and where, with dates. Who else was present or heard about it. Whether it has happened before. And what you are asking for, which is usually that it stop.
Write it the way you would tell it to a friend, not the way you imagine a lawyer would. "On June 12 in the stockroom, Mike put his hand on my waist and told me I should smile more. Dana was there" is worth more than a paragraph about a hostile environment.
Then check the whole email for three things and take them out. Guesses about why someone did it. Anything you cannot back up. And anything about other employees that is not connected to what happened to you.
Do not threaten to sue in the report. It changes how the document reads later and it does not make the employer act faster.
Where to send it, and how to keep it
Follow the employer's own complaint procedure if there is one. Employers are expected to have "an effective complaint or grievance process," and using it removes an argument they would otherwise make.
Send it to a person, not only to a shared inbox, and copy a second person if the policy allows it. If your direct supervisor is the problem, go above or around them.
Then get a copy off company systems the same day. Forward it to a personal email address, or take photographs of the screen. Access to work email and messaging apps can end the day employment does, and it often does so without warning.
Keep that narrow. Save your own complaint, the replies to it, and documents about what happened to you. Do not take anything else. That means no privileged or attorney-client material, no proprietary or trade-secret information, no customer or client data, no medical records belonging to other people, and no personnel files or HR documents about coworkers that have nothing to do with your complaint. Do not use someone else's login and do not copy whole folders or databases because the useful part might be in there.
This is not a technicality. Taking employer material can give the company a separate reason to discipline or sue you, it can create problems under confidentiality agreements and other laws, and it can turn a straightforward retaliation case into an argument about your conduct. If you think a document you should not copy is important, write down what it is, where it lives and who has it, then tell your lawyer. There are lawful ways to get it later.
Keep the same discipline for what comes next: the reply, the meeting invitations, the investigator's notes if you are given any, and the outcome letter. Save each one as it arrives.
Sources [1]
The law that protects you for sending it
All five states this firm practices in make it unlawful to punish a worker for reporting or opposing harassment.
California makes it unlawful for an employer to discharge or otherwise discriminate against a person because they opposed practices forbidden under the act or filed a complaint, testified, or assisted in a proceeding.
Texas makes it an unlawful employment practice to retaliate against a person who opposes a discriminatory practice, makes or files a charge, files a complaint, or testifies, assists, or participates in an investigation, proceeding or hearing.
Washington makes it an unfair practice for an employer to discharge, expel, or otherwise discriminate against a person because they opposed practices forbidden by the chapter or filed a charge, testified, or assisted in a proceeding.
Nevada makes it an unlawful employment practice for an employer to discriminate against an employee because the employee opposed an unlawful practice or made a charge, testified, assisted or participated in an investigation, proceeding or hearing.
Colorado makes it a discriminatory or unfair employment practice to discharge, demote, harass, or otherwise discriminate against any person because they opposed a practice the statute forbids, filed a charge, or testified, assisted, or participated in an investigation or proceeding.
Now the part people oversimplify. It is not true that every report is protected no matter what. The EEOC draws a line between two things. Taking part in a complaint process, such as filing a charge or testifying in an investigation, "is protected from retaliation under all circumstances." Other acts of opposition, which is the category most internal HR reports fall into, are protected "as long as the employee was acting on a reasonable belief that something in the workplace may violate EEO laws, even if he or she did not use legal terminology to describe it."
So the protection turns on a reasonable, good-faith belief that what you are reporting is the kind of conduct these laws cover. A complaint about a manager who is simply rude to everyone, with nothing tied to a protected characteristic, may not qualify. Coverage matters too: your employer has to be big enough to fall under the statute you are relying on, and the state statutes here are worded differently from each other. Nevada's retaliation provision, for example, ties protection to opposing a practice made unlawful by its own sections.
The EEOC also says plainly that engaging in EEO activity "does not shield an employee from all discipline or discharge," and that employers remain free to act for genuine non-retaliatory reasons. None of that is a reason to stay quiet. It is a reason to describe the conduct concretely and to say what you believe it is about, so the reasonable-belief question is easy to answer later.
Sources [2] · [3] · [4] · [5] · [6] · [7] · [8]
If there is no HR
Small employers often have no HR function at all. That does not remove the value of writing it down. Send it to the owner, the general manager, or whoever is above the person involved, and keep the copy.
If the company is small enough that the harasser is the owner, the written report is still worth sending, because it establishes the date and the fact of the complaint. Send it and then get advice quickly, because a small employer is also the situation where retaliation tends to arrive fastest.
Watch the employer size question separately. Some state statutes reach smaller employers than federal law does, so a company too small for a federal claim may still be covered where you work.
Questions, answered.
Will HR keep my complaint confidential?
Usually not entirely. An employer generally cannot investigate without telling the person accused what was alleged. Assume the person you are reporting will learn about it, and plan for that rather than being caught off guard.
What if HR does nothing?
Send one short follow-up asking, in writing, what the status is. Then stop waiting. The agency filing deadlines run whether or not your employer ever responds, and an internal process does not pause them.
Should I record the HR meeting?
Do not assume you can. Recording rules differ by state and some make it a crime to record without consent. Take detailed notes immediately afterward instead, and ask a lawyer before recording anything.