I've currently been signed off after having my wisdom tooth out last week. Signed off because I'm in so much pain. The dentist was only able to remove part of the tooth, so there's still a large part of the tooth that is impacting and pushing on my other teeth. (Reason it was being removed in the first place).
I self-certified first, and then got a fit note from Updoc, who I have used before and are a legitimate GP website. I can't get an appointment with my own GP, there's at least a 2 month wait. They tell you to go to A&E if it's an emergency. Which is why I used an online service.
About 6 months ago, I was signed off with stress, same employer. I used Updoc for my fit note, and there were no problems. This time, my manager has emailed me and said HR have said the fit note doesn't meet the requirements for a medical letter and I need to see my GP.
The fit note is the exact same format, same GP as the previous one. Can they really refuse to accept it? I've tried googling the laws around fit notes, but can't seem to get a straight answer on what is acceptable.