If they knock, that's something.

In my past experience some delivery guys just left a note.... they probably didn't even have the package. I mean I don't blame them, probably too little people and to many stops so I can see why would happen... it's a company issue.

Now thankfully doesn't happen anymore, except some rare exception.

That said now that I work from home permanently...everytime they have the crazy idea of telling me I wasn't home when I know I was....I have a meltdown. Plus usually there is other people home and I also have a dog that once he hears the doorbell doesn't stop barking like crazy, so it's like even impossible for me to miss it.