Dear Siva,
I would like to bring to your attention a simple loophole in your refund offer. I hope you are aware of the recent Sun Certification Promotion of free exam retakes. Here are the details:
Purchase a voucher for most Java technology or Solaris OS certification exams between July 1 and September 30, 2006, and should you need it, you can take the exam one additional time for free. The retake exam must be taken by August 15, 2007 the following year. This offer is available in most countries around the world.
As per this offer, a possible situation is that a person could buy your simulator and take the certification exam and purposefully fail the exam. This makes them eligible for a refund and 50% discount on any product. That's a cool saving of 150% on whizlabs products.
Kindly do the needful measures from anybody exploiting this offer. Thank you.