I'm not just talking about validating the card numbers' format, im talking about actually sending it through authorize.net(for instance) to validate the card info. Is there a way to do this without a transaction through authorize.net?
I already saw this link and its not what I'm looking for. I want to send the credit card info to authorize.net for validation/verification, not just validate the format.
No. The only way to know a credit card is valid is to process a transaction. Only then is the bank contacted to validate the credit card.
FYI, I am the author of the article you linked to.