Can we stop please. One guy asks a question about a rumor, then basically recants.
1 page later we're getting spun up over something that isn't probably happening. What are our union leaders supposed to respond to? A unsubstantiated APC rumor or did I miss the FCIF declaring war on sick leave users? The company got their pee-pee whacked pretty good over this Dr. note issue in a grievance a while back (see contract).
If you're going out sick over the declared holidays or need to use your disability sick account, it's possible you'll need a letter IAW the CBA. So go to the doctor and get one.
Other than that, I agree it's stupid to ask you to produce a note you didn't know you would need after you're well, especially if you didn't go to a doctor in the first place. I doubt this happens too often.
If I had to go out sick tomorrow, I'll bet it would be just like every other time. Uneventful.