Whether it occurs within the workplace or in marriage, verbal abuse can be difficult to prove. Verbal abuse leaves no physical evidence behind, so it is often your word against the abuser's. The key is to document things as well as you can, and keep an organised record of the abuse. If you can show many pieces of evidence of the abuse, it will increase the chance that a jury will believe you.
Keep a notebook documenting the verbal abuse. Write down the date and time of each incident, what was said and who was present to hear it, and any useful background information.
Get testimonies from people who witnessed the verbal abuse, either on a digital recorder or in writing. These testimonies will strengthen your case against the abuser.
Record the verbal abuse on a digital recorder. Record any abuse that was spoken over the phone on a telephone recorder.
Save abusive notes and e-mails. If your abuser leaves a note on a dry erase board or some other place where you can't actually save it, take a picture of it.
Seek a protective order against the abuser if the abuse is occurring at home. If it is at work, file a formal complaint. You may be able to convince the abuser to cease harassing you, and you may be able to use the report as evidence later on.