Redeem your Playstation gift card for anything from the largest library of Playstation content in the world, including games, virtual currency and add-ons, subscriptions and more.
Yes sign into Playstation network and create an account at playstation.com. Go to redeem codes on Playstation Store and enter the 12 digit voucher code.
Check online by going to your Playstation Account.
The gift voucher is valid for 12 months from the date of purchase. Since there is no expiry date on the back you can only check its validity by redeeming it.