Have you ever forged a doctor's note for your employer?

i would think HIPAA laws would prevent the doctor from releasing whether or not you actually saw the doctor, should the employer try to verify. do you think employers would care if you actually went to the doctor? or do you think they’re more interested in just having the required note for the file?

the reason i’m asking is because my job requires a note in order to wear sneakers at work per the dress code. two years ago i went to the doctor and got a note, but now the employer asked me to get a new one. i don’t think they actually even care if i actually went to the doctor, they just want a note in case someone higher up asks why is she wearing sneakers, they could say “she provided a note.” then i started thinking what would prevent someone from doing the same if they needed a note for having been out sick. the employer would not be calling the doctor so why not? what do you think?