1. Create your own Sony Entertainment Network account at eu.playstation.com/registration or sign into an existing one.
2. Go to PlayStation® Store.
3. Select the “Redeem Codes” option (for PS Vita, first tap the Options icon at the foot of the screen).
4. Enter the 12 digit voucher code you received and then select “Continue”.
5. Follow the on-screen instructions to redeem your voucher code.