Affiliates who promote offers through the WarriorPlus system are responsible for the commissions part of a sale for ALL refunds that are processed by the vendor for sales made through their affiliate link, regardless of 'how long' it's been since the original purchase.
When a vendor processes a refund through WarriorPlus, the funds will be automatically deducted from the referring affiliate's account, for the amount that was paid to the affiliate.