Originally Posted by MikeB

Without knowing all the numbers it is hard to say. How long have they been inactive? What is the reason for a failed rebill (over limit, card stolen, expired, etc)?

Best option is to try to first get the customer to update his credit card info. If the new info fails, then send them over to Password By Phone. Of, if there is no response after a week, send them another email with an alternative method of payment option (Password By Phone).