At my last place of work, which was where I injured myself, they actually wouldn't follow doctors orders for the injury I had sustained at work. I had to go into work and still work, then go to pysio and take pain killers that made me stoned up to the eyeballs.
I got my partner to call me in so they'd have more than enough time to find a replacement for me, because when I was stoned, so out of it that it wasn't even funny and in so much pain, even with the pain killers, I screamed every time I moved, breathed or talked, it wasn't condusive to a conversation with my employer.
Even when my partner called, they told him I had to come in, I had no choice. He reminded them I was on doctors orders to not be in work at the time, and reminded them that they had the doctors certificate for me stating that, and we also had a copy if they'd lost theirs.
If I had called, I would have ended up going into work and making my injury even worse, tbh, and no place of employment is worth that. My boss shot my integrity to all h3ll anyway, abused and bullied me and made me feel worthless, so I don't really care that he had to deal with my partner just once. Said partner can be pretty scary when he wants to be. =D