PSN Activation Guide
Use this PSN activation guide to redeem your PSN key.
Online
On a web browser, Sign in to your PlayStation Network
In the Account section on the left, select Redeem Codes
Enter your 12-digit voucher code or prepaid PlayStation card number, and select Next
Console
From the PlayStation Menu, go to the PlayStation Store.
Select Redeem Codes on the left-hand side menu
Enter the code and select Continue
The content will be automatically applied to your account, available for immediate download, or available in your Library > Purchased section