This prompt may appear because one of the credit card validity period or CVV2 (the last three digits on the signature strip on the back of the card) is incorrect. For example: if Everbright Credit Card is valid in March 2014, you should enter 0314 in half-width characters, and the format of the last four digits is month/year. Please enter it correctly, and to ensure card security, do not provide the credit card expiration date or CVV2 to anyone else.