I dont know if im in the right thread or not but im just wondering, Sony asks for your address that is linked with CreditCard for billing information, do they send you something in the mail saying you added funds or is that just so they can verify the Card ??
Maybe, but I think they were just wondering/worried about why Sony needs an address. Sony won't send anything. What you first said ("the billing statement that comes in the mail every month") might have confused them, since you didn't mention credit card statement; it's not a statement from Sony.
Sony uses AVS. Its verifies with the bank the information you put in regarding the card. If it dosent match it wont accept the card. If you dont want to add a cc to your account you dont have to put in your real address.