We've considered going the route of sending ALL our packages signature required because the 'scammers' or whatever you want to call them have gotten much smarter. In the past four months we've had two chargebacks through our merchant account...both supposedly for non-delivery. In both instances, the USPS Delivery Confirmation showed the package as being delivered, but because they weren't signed for, we lost and their money was refunded. The dollar amounts weren't huge, but the $30.00 each chargeback fee was a killer.