Most errors on our stores' checkout pages are pretty self explanatory--coupon code expired, missing email address, etc. However, there are a few that might not be as obvious. Here's what they actually mean, and what you can do to resolve them:

Your credit card has been declined.

Reenter your card number and try again--there might have been a typo. If the error persists, please contact your issuer.

Payment authorization failed, please reenter your credit card number.

This error indicates that the card number, expiration date, and/or card verification number fields were left blank. Enter these values and try again. If one or more of these fields are missing, contact the merchant.

There was an issue validating your payment information, please reenter your credit card number.

This error indicates that the card number field was left blank or a merchant's custom checkout script is failing.

Payment authorization failed, please verify your information and try again.

This is due to the AVS/CVV response from the bank not being approved.

Credit card number is invalid.

The card number you entered doesn't match the selected card type, e.g. you typed in your Discover card number, but the pull-down menu says Visa. Double-check the card type setting and try again.

A problem has been encountered with your shopping session.

This error indicates the shopping session is more than 14 days old and has expired. Add an item to your shopping cart to start a new session. Items previously in the cart may need to be re-added.

Your cart information is temporarily unavailable. Please try again.

This error indicates a checkout server was unavailable. Click the link provided to try again. If the error persists, please contact the merchant.

This transaction cannot be processed.

or

This transaction couldn't be completed. Please redirect your customer to PayPal.

This occurs when there's an issue with the PayPal account you're using to make the purchase. Please contact PayPal or use a different payment method.