I left work when my contract was up due to disability and pregnancy. I was very clear to my former boss that I was not returning and I was in fact quitting. He proceeded to submit a leave of absence request on my behalf anyway without my consent, and never took me off as an employee. I didn't know until I got a letter from the LOA office recently.
He also made it so my leave would be up less than a month after I gave birth. Had to email the company's HR department to let them know I wouldn't be returning to work.
I'm assuming he did it because he was having a massive turnover rate in employees before I left and didn't want to add another one on to it.