I saw Sun Certification Retake Promotion detials. Thank you for sending the information. Suppose if I buy the SCJP exam voucher from Sun.com website, how many months that will be valid for. I know that the voucher can valid for one year, but I didn't see that information in SUN website. Now I am planning to buy a voucher directly from Sun website. Is it a good idea. could you please tell me any other ideas to buy a voucher.