unauthorized

Yesterday, I sold a virtual item worth $1300 dollars to a buyer on Ebay with 100% positive feedback from 68 transactions. He messaged me before purchasing the item to negotiate prices and also after purchasing to talk about delivery. He payed me with a confirmed address and a verified Paypal...

Recently I've dealt over $1,000 in virtual merchandise and to my surprise I wake up to a couple disputes due to "Unauthorized Payment" for over $700+ lossed. I have their confirmed address, if I send them a box with something random in it and provide online tracking information will I win? Or...