I might be late to the party but when I sold my iPhone X back to Apple I didn’t realise that I could get a refund on the remaining Apple Care +. On checking in store I was told that my Apple Care was taken into account when I get a valuation, this is incorrect. If you have anything left on Apple Care + and you’ve sold the iPhone you can get a partial refund. Apple take into account the amount of months you’ve used and any claims.
I called Apple on 0800 107 6285 and stated I needed Apple Care support.
When I spoke to the advisor I gave the serial number and Apple Care + agreement number.
Once calculated and given your account number you’ll see the money within 15 days.