Should your method of payment be refused, check with your financial institution to ensure funds are available and the card is active.
Occasionally, Shopify's secure payment processing will reject or flag a payment method as high-risk. Unfortunately, once that has happened we are unable to authorize that payment. However, you are welcome to try another method, such as another card or Paypal.
If you run into any payment issues and none of the solutions above work for you, please email email@example.com and she'll do her very best to resolve the situation.