So, I know that everyone seeing the subject line has instantly rolled their eyes and said "Dummy. He knows it is not possible nor legal to do anything to a chart note once it has been signed off; all you can do is offer an amendment".
Honestly, I was more curious to see if there was a newly found/developed way to do it.
And is it really illegal to edit (in anyway) a chart note once it has been signed off? Back in the paper days, if you put a note in the wrong chart, you wouldn't slap on an addendum explaining the mix-up; you'd just move the note. Hm. But you've already mentioned those other docs that can go through that process to do a note migration. So I suppose such actions have been sanctioned as legal, as long as the change is properly documented.