When a new customer follows an affiliates link to a store powered by Kartris, the store sees the affiliate ID and records this in the customer's session. A 'hit' is also recorded, indicating that the link resulted in a customer visiting the site.

If the new customer goes on to make a sale, two things happen.

Firstly, the new customer's record is permanently tagged as 'belonging' to the affiliate who referred them.

Secondly, the affiliate will be credited with commission for this order, which will be the % of the total value of the order minus shipping, and any discounts.