So I sold something on ebay, buyer messaged me and said it's too small so can they swap for a 14. I do have a 14 also so I said yes that's fine, please send back to arrange a 14 (they also agreed to cover postage)
They've just sent it back but now I've confused myself... If I send them an invoice for extra postage (signed for) then send them the 14, will I still be covered for any claims of loss/damage etc if the item I sent isn't specifically linked to an eBay transaction? Or should I just refund her and list the size 14?