There will be no justice with Paypal and Ebay.

I had a buyer say that they recieved only part of what I had sent them (what!!! only part - did someone open the package on-route and steal parts???) When I asked for the buyer to return for replacement or refund, with me refunding the postage they pay for the return, she opened a case in Paypal for item not recieved and won.

Paypal would not use her messages, that were sent through Ebay Messages, as proof of her having recieved part and not wanting to return. The only thing that mattered is that I did not send it via a trackable method so therefore lost. Ebay & Paypal said that, for privacy reasons, they could not communicate with each other about the transaction.