I don't believe this for a second. Do you have a source?
Now if the car was ever repurchased by Tesla, they could remove it and then resell it without but I'll bet anyone who thinks they should have had it never did because it was resold by Tesla at some point.
If was after their switchover to life of first owner and not car, then of course it won't transfer. If you buy a new S/X today with free unlimited supercharging for life, it will not transfer.
So to answer my own question, there is one report of someone who bought a P85 on the tesla.com forum from a used car dealer. This included screen shots of tesla confirming that FUSC is removed from any cars sold by third party dealers or vendors or any time the car ever gets wholesaled.
Someone else posted that if the Monroney sticker listed it, Tesla can't remove it, but my Monroney sticker says "Supercharging INCLUDED". It says nothing about it being free although one could argue that it can't be included on the sticker if you have to pay for it later. If it had said "Supercharging Enabled INCLUDED" then you might be able to make that argument. Ironically, my "purchase agreement" says "Supercharging Enabled" but still nothing about free for life.
I'm pretty sure in my big Tesla envelope of docs when I first got it there is a document that spells out the transferability but I could have a faulty memory.
Tesla has said many times that the FUSC followed the car. More importantly, they've said FUSC is a feature tied to the car which certainly implies that it will always be with the car unless Tesla buys the car back and then removes that feature. So it's already astonishing that they are outright claiming that if a FUSC for life car gets wholesaled that they are allowed to remove it.
I have yet to hear of a private party sale having FUSC stripped but given they did it to wholesaled cars never having been back in Tesla's ownership, I would not be surprised to see them try that next.
The fact that the wording of my terms changed is very disturbing.
Free Unlimited Supercharging Removed Without Notice? | Tesla
What year model S have transferrable free supercharging? | Tesla