Due to the digital nature of our training kits and online courses, we cannot unfortunately accept returns. All sales are final upon fulfillment. As it relates to online courses when purchased via purchase order and invoice. Sales become final upon invoicing (eg, a customer contact us and asks us to invoice them for x-amount of online course credits; we then, in turn, add those credits to their account and invoice them: this constitutes a fulfillment of goods and the sale is final whether those credits are used up or not.)