I was never accused of any inappropriate behaviour with a female co-worker, but a women I worked with once complained to management that because I "slammed" down the phone in a conversation with her, I made her deaf in one ear.
Now...I will admit I did hang up on her...where I worked, I dealt with internal (other departments) and external customers of the company, and she had been nagging me about on an issue (delivery by an outside courier company) I really didn't have any control over. She had called me for the 4th time that morning, and I had enough, so I ended the conversation while she was still talking.
Well...that got her knickers in a knot, and she made her complaint to HR that I damaged her hearing. I got called into HR, and was asked for my version of the incident. They knew she was just causing trouble, but had to go through the motions. They wanted me to sign a document apologizing to her for my behaviour, and I refused until my lawyer looked at it. I called a lawyer buddy of mine, who said no way should I sign it, and to tell them I was retaining legal counsel and filling a counter-complaint of my own against this women, and the company, of harassment, and creating a toxic workplace because of this frivilous complaint.
Well...HR didn't know what hit them....I left their office, and it wasn't 15 minutes till the District Manager was at my desk, asking to speak with me in private. He let me know that nothing was going forward, as far as he was concerned, it was all going to go away and nothing would be put in my file. Further to that, he told me if she still continued to complain about hearing damage, they were going to demand evidence that she had perfect hearing before the incident, and ask for her to be tested (at her own expense) for hearing loss after.
After that, whenever I had occasion to walk by her desk, I would mouth a greeting, and grin....