Where are PSN codes?
Assuming you are very lucky and actually guess it correctly,the second hurdle for you would be whether it is used or not, again your odds are further reduced. Therefore it is virtually impossible to actually guess a valid code that can be used.
Launch the PlayStation app on your Android or iPhone. 2. Click the PS button located at the bottom-center of your screen. Then click “Redeem Codes.”
Every PSN voucher code contains twelve digits.
How many digits is a PSN code?
The code shouldn’t expire. As long as you have an active account on your game console be it a PS4 or Xbox One then you should be able to install and play the game whenever you want. If you’ve purchased games from the PS Store or Xbox Marketplace then those don’t expire.
Go to PlayStation Store > scroll to the bottom of the sidebar > Redeem Codes. Carefully enter the code and select Redeem. The credit or content is now applied to your account.