Not all products qualify for a referral fee refund when returned. So long as the product you are returning does not fall into the media category, Amazon will reimburse up to 80% of the amount you paid during the transaction and any other expenses up to $5. The rule with Amazon referral fee is that when a media product is returned, sellers get back their money with no questions asked. Though a rule of thumb, remember that the refund may not include the seller fee.