It may also be a limitation of what's easy to do with their payment processor. As someone who accepts purchases online, my payment provider gives me a lovely d

It may also be a limitation of what's easy to do with their payment processor. As someone who accepts purchases online, my payment provider gives me a lovely dashboard of all transactions, and on each transaction there's a nice and easy "refund this transaction" button for me to click. I'm happy to click this button for you, in particular because it also refunds me of the transaction fee so refunding you is essentially "free" (with the exception that I don't get the money from the sale, of course). Refunding partial transactions is a whole can of worms. A small list of questions that you would need to answer are: * How much do I refund you? How do fees and taxes figure into this? * If I sell you a bundle that includes the thing you want to return, but that thing was also on sale separately (possibly at different rates in different bundles), what do I do? * How much of the transaction fees will my payment processor refund to me? Not to say that these questions don't have answers, and possibly favorable ones. Just that it's a lot more complicated than just saying "either I click the refund button or I don't".