If your credit card has been declined declined, it’s normally to do with your bank’s automated fraud systems, and not with Typeform or Stripe (our payment processor).
If this happens to you, please make sure your credit card information is correct and try to submit it at least three times. If the transaction still doesn’t go through, you will need to call your bank to clear the transaction.
Every time Stripe submits a charge request to your bank, its automated systems determine whether or not to accept the charge. In order to determine this, Stripe takes several things into consideration, including account balance and card expiration date.