I went to download a free game an it asks for my credit card details its a free game why do i need to do this an no my cars hasn't expired when i re-enter it t doesnt workl

For some reason Apple just like to have payment verification on file.

You can remove it at anytime after you've added it (I do not know why they do it this way)

If you still continue to have issues with it, I recommend calling AppleCare and asking to speak with the iTunes department.

800-692-7753

Follow these instructions to create an App Store account without a payment method.

Create an iTunes Store, App Store, or iBooks Store account without a credit card or other payment method - Apple Suppor…

Sorry, can't say. You'll have to contact Apple's customer support.

Apple sends a verification request to the card issuer. If the verification fails you get the message that the card was declined. That message comes from the issuer; Apple is just a pass-through.

A “payment declined” message means that the issuer of the credit or debit card you have on file in your iTunes account rejected a charge or account confirmation. It is not an Apple problem; Apple is just passing through the message from your issuer. There are a number of reasons the charge or verification might be declined:

1. Insufficient balance or account in arrears
2. Account suspended for suspected fraud (not necessarily by you)
3. Error in card number
4. Wrong expiration date
5. Wrong security (CCV) code
6. Address in your iTunes account does not match exactly the billing address for the card
7. The card was not issued in the country of the iTunes store