I had an item for sale on eBay and agreed with buyer to sell directly through Paypal. In the past, I have sent the buyer a detailed invoice, to make the transaction eligible for Paypals guarantee. In this case, the buyer sent the money without any invoice. Is there any reason why I would care to have an invoice, or is it only for his benefit? Additionally, he asked me to mail the item to a different address than the one on his PP account. Being that there is no invoice; is there any risk for me to do that? Thanks!