Yeah. You report these things verbally in person, not on written media. This has two advantages: your employer can decide to investigate or forget about it, and you can judge whether you are getting a bad response in person during your report, and act accordingly.

You make a report in writing if you could personally be held liable, and you want your disagreement on the record. But doing so is a burning your bridges moment.

Not quite sure how you handle this if you are remote...