When I try and download an app it is saying my billing security code is invalid, but it was working fine

Question

When I go into  download an app in the appstore it is saying my billing security code is invalid,It was working fine before.

Answer 1

Same thing happend here.  Yesterday I called and chatted with a lady who told me right away that they are having issues with people validating their credit cards.  She told me to contact support by email, which I did twice, they replied with the following:
1. Contact your bank or credit card company and ask to speak with the fraud/security department.
2. Tell the representative that your security code is being rejected. Ask them to review your account to see what might be preventing you from using the card to purchase from the iTunes Store. Ensure that they thoroughly review your account until they locate and resolve what is causing the issue.
3. The bank or credit card company will need to remove any holds on your account.  The bank or credit card company could also bypass the authorization process.
I tested my card with another trusted service who asked to verify with the security code and it worked fine.
I guess at this point you could call your bank (just in case) or just wait.