Got to the post office, awhile after 17:00, and they hadn't put all of the packages into the system yet...so I had to wait while she tried to match the long delivery notice card number to the one on the side of the parcels...then I pointed out my package (the one with my name in giant bold letters). Finally got my package, and since I had already found the reporting function online, I didn't bother to ask there...
Gun is safe and sound, and very very cool.