If it happens enough times, Amazon will/should automatically put signature confirmation on the packages.
UPS has been "stealth" delivering shit lately for me too. No knock, no dingdong. Just drop and dash.
Some of my UPS deliveries have a required signature (age thing - snus/tobacco) and I have lost count of the number of times the fuckers have left a sticker on the door. A few times multiple people were home (not necessarily in the living room though), AND there's the dog. Anytime so much as a tree branch moves too much, no matter where she is in the house, she'll be at the front door barking. Actual people? Jumping and barking.
You mean to tell me you, Mr UPS Driver, actually knocked? And no, just looking at the door intently, perhaps breathing hard on it, is not knocking.
It's basically gotten to the point that the day I know that package is coming, I have to be keenly aware of any possibly loud truck going down the street, and I have to look every time to see if it's the UPS truck. If I happen to miss their approach, and he manages to not alert the dog, I will have no notification he has reached my door.
Next time, I think if I get the opportunity, I'll run to the door but step out of site of the glass. If I don't hear a knock, I'll look and wait to see when he's stepping away from the door (after sticking the note) and then run out there.
I'd be very surprised to actually hear a knock.
One time, I had to endure three delivery attempts (third time was the charm). It sucks when its usually predictable to be sometime after five (as much as I hate that when I'm home at 2 on the days I try and schedule it, and fear an early delivery). One day I was late getting home (3ish - truck broke down) and the note was on the window. I've never been so pissed as that day that UPS actually arrived before 5pm. Sometimes, I've had to wait till after 6:30 (terrible waste of a day off that one time, too afraid to leave the house and miss it).