with paypal we were able to trace down the HOLD and REFUND action, through notification. Its pretty straightforward - buyer makes purchase, COMPLETED status came. Buyer canceled the order, REFUNDED status came.
Now, with managed payments - sale will came with notifications. But how to handle refunds? For example buyer made mistake during order, bought double quantity. Already submitted to external system through notification. Buyer later asks for lower the quantity and partial refund. How to get this partial refund to the external system as soon as possible?
Thanks for any help