Error: 2005 Invalid credit card number. What's going on?

Problem Statement

This article helps you understand 'error: 2005 invalid credit card number. what''s going on?'.

Solution

This hard decline (a hard decline is a permanent decline that should not be retried as subsequent attempts will also be unsuccessful) indicates that the card number entered on the checkout page is incorrect or otherwise invalid. To resolve, ask your customer to double check card details, try another card or contact their issuing bank for more details.