1. Check the card details to make sure they are correct. For example, due date or billing address. (common problems include misspelling)

 2. Make sure you enter the correct security code - this is the three digits on the back of the card.

 3. Your issuing bank may refuse your payment, please contact your issuing bank. If the above information is still invalid, you can try other payment methods or use a more convenient and secure PayPal payment!