PS3 CE Product Code

[HEC]

There are two vouchers with codes in PS3 (CE) game box box. One is the SE membership 6-3-6-3 registration code - you don't really need to redeem it (to play the game or receive the CE items) - it's just to add your game on "display" on SE Members social site.

The one you need to register is the 4-4-4 PSN code which indeed needs to be registered via PSN (Store or account management).