Hope I can get some advice here.
This has been happening to my Amazon Associates account for some time. I've been earning consistent advertising fees via Amazon, but once in a while in my Earnings Report, I see items with negative fee like this one :
Product Title Link Clicks Item Shipped Revenue Advertising Fee
Product A - -1 $-28.99 $-2.30
I guessed those were returned items. While I have not earned any fee from the sale of that product (no fees added for the sale), I've been deducted with the negative fees when the item is returned. So items like these are not only lost revenue, but basically they are eating into my earnings from valid orders.
Does anyone has some experience?