As a delivery driver, it's just force of habit. Even if you put a note on your order, we've just done the same thing 20 times before we get to your house. It's automatic. Better to put a sign on your door. Maybe say you have a sleeping baby or something and you don't want to wake them up. That way hopefully we see the note as we're about to knock.

So weird. I get really upset that they don't knock or ring the bell. I can easily miss a phone notification and then my food sits out there getting cold and soggy. IDC if they wait or not, but I need to know that the food has arrived and the easiest way for them to notify me is to spend 2 seconds reaching out and ringing the doorbell. It's easy and costs them nothing, but only about 1 out of 20 will actually do that despite explicit instructions to do so.

????