If a recieved, unopened package is "returned to sender" through Royal Mail, will the sender have to pay return postage?
I sold something on E-Bay, but due to an error, we have agreed to cancel the purchase. The original plan was for her to refuse delivery when the item arrived. Unfortunately, she was out and her housemate received the delivery from the postman (sent first class - no tracking, not signed-for). She has not opened the item, so to avoid paying return postage, she says she will write "Return to Sender" and put it in the nearest post-box. I'm afraid that if she does this, Royal Mail will slap me with the unpaid postage charge when it arrives.
I know if an item is refused delivery, then it will get returned for free... but what about a recieved, unopened item?