Credit Card Discussion

i have a playstation network account and i’m planning on buying a psn card. i don’t have a credit card though.
does it work like itunes where you need to enter a valid credit card number first before you can use the gift card or can i just use the psn card immediately without entering a [...]

I threw away a recipt for a playstation I got at Walmart on accident. And go and behold something was wrong with it after 2 weeks, I returned it and they gave me a card with instore credit. I was wondering what we can buy off them. If I can buy a gift visa card [...]