I purchased a used iPhone and I checked the phones warranty status which it is still good. If I go to a apple retail store would they honor the warranty even thought I am not real owner? Or they question me about it?
The Genius bar has never asked me for ID or anything, or even so much as asked for my full name, they just check that the device is under warranty. I think there is a form to transfer Applecare, though, if you're worried about it.