You credit card number is invalid. According to your computer’s clock, your credit card expiration date is invalid. The credit card expiration date should be at least 4 characters long and in MM/YY format. You need to enter your name as it appears on your credit card. Your credit card number is too long. Your credit card number must be at least ten digits long. You need to enter your credit card account number. You need to choose your method of payment.