I guess you can ask for that document before you buy a car to be sure they have looked after the car carefully before selling it...
It seems that they have to note the SOC on a regularly basis. I would be curious to know if they really do it.
I'd bet it's safe to say most dealers have never seen this letter, or if they have seen it....it is next to the letter about what is Topix, that my dealer had no idea what Topix was :-O I love my Jag, and my servicing dealer is amazing, but they have confirmed that JLR gives them almost no support!!
We just bought a new BMWX5-45e to sit next to kitty and it has a form something like this in it from the factory. We ordered it and it only sat on the lot for a couple of days, so the form wasn't filled out. It makes me wonder if some new European requirement demands this.