In the past, I heard that when you bought a Macbook through apple certified refurbished, they would replace the entire outer shell each time. I also vaguely remember
advertising that in their refurbished page. Now all it says is:
No mention of replacing the case. Can someone confirm if they still do this? Also what else do they replace? (eg battery)

We test and certify all Apple refurbished products and include a 1-year warranty.
Limited supplies, but updated frequently. Availability is guaranteed upon receipt of full payment.
No mention of replacing the case. Can someone confirm if they still do this? Also what else do they replace? (eg battery)