You'll need multiple memory sticks to access different PSN accounts on your PS Vita.

But you'll need to own multiple memory cards if you want to use different PSN accounts on the same system, Sony has confirmed.

Sony suit Crystal MacKenzie confirmed the news in an interview with Wired, explaining that accounts are linked to memory cards rather than the system itself.

"Your PSN ID is bonded to your memory card and your memory card is bonded to your Vita," she explained

"So if you wanted to change different PSN users but use the same memory card, you would need to go factory reset."

Presumably this is the precise moment where we start complaining about those expensive memory sticks again, right?