Originally Posted by YenRou
It won't be that easy. According to the guide which is posted on this site's front page, you need to have the previous owner delete the save data.
You can't do it yourself.
This is incorrect. as long as the game is set to factory settings, trophies can be earned. It's not really a big deal or hassle at all..... Takes like 2 extra minutes prior to playing a pre-owned game. Delete the save data on the game card, exit the game, delete the game data on your Vita, then restart the game. You;re good. It's quite simple, I have done it.