Can I transfer a Playstation savegame to someone?
Solution 1:
One Playstation Plus account can be used in up to two different consoles.
To be more precise, one Playstation Network account can be used in up to two consoles (it used to be five) at the same time. That's where the restriction is. You can add/remove devices from an account though...
So yeah, I believe they could share that PS+ account on both consoles and use the same saved game.