If you are paying by credit card:
- Is the credit card number correct?
- Did you enter the correct expiration date (month/year) and is your card still valid?
- Did you enter the correct CVV number (three-digit number on the back of the card)?
- Is there sufficient credit on your credit card?
- Have you registered with 3-D Secure or SecureCode?
If you make a payment using your PostFinance Card (Switzerland):
- Is the ID on the back of the card correct?
- Did you enter the correct expiration date (month/year) and is your card still valid?
- Is there sufficient credit in your account?
If it is still not working, please get in touch with us, providing us with the following information: your user name, project you would like to back, payment method used.