ok i was on itunes bought something and i had a prepaid card and bought a season of a tv show and I only had .49 cents on there and it was 15$ so is it already payed for?or when the billing info comes to me i pay it than?or what i am fairely new to this
ya for the prepaid card i mean the itunes gift card but i also have my 4 digit card number on itunes

If they swiped your card and it was accepted than YES, you bought the item. When your statement comes you will see a charge for "going over your limit." Credit card companies LOVE to charge you for things! Late payments (even one day), over limit fees, etc. etc.

Also - maxing out your credit card can cause your credit score to go down, so be careful not to max your cards.

Your credit report shows all your cards, with their available balances and also a "previous high balance" which will show the highest outstanding balance you've had on the card. So credit companies can see on your credit that you like to run up a bill and this can make it hard to get credit - and it can also lower your score.

Good luck to you!