If you send orders to someone, make sure you have a tracking number or confirmation number and that you require a signature for delivery.
I had a chargeback today that the credit card company chargedback, even though I had a tracking number and delivery confirmation.
I lost $600 on this deal, plus a bunch of fees, but UPS is investigating where the package went, so may end up recouping a little of it. Paypal is still appealing with the credit card company, so it may not be a total loss yet.
Anyway, remember to require a signature, tracking or delivery confirmation and sell only to confirmed addresses.
Hope this helps save someone the headaches I am going through.