Four coins from three different auction firms arrived simultaneously. Thankfully, my wife was home to sign for them!
My mailman always scans U.S. origin coins at the mailbox, indicating that they are "delivered" when you track them. On foreign dealer shipments he forgets to scan them (or doesn't for some reason) except for Royal Mail, which he does scan. It can make for some tense moments. I have bought coins from Spain, Netherlands, France, Germany, and the U.A.E. - all of them without a scan but coming by USPS - I have only received one coin via DHL so far.