Here’s how it works: When you make a purchase from us for at least $250.00 you will get an Invoice number. You will see this in 2 places. When you checkout and when you proceed to the secure processing server. Write this number down, and give it to your friends to use when they make their purchase. See images to the left for details. They will enter this number in the Referred By field in the Sold To section of the Checkout form.