My wife, my son, and I all run small businesses from from the one suburban premises. This means that between us we get frequent deliveries -- and it also means that someone is here essentially any time a delivery is made.
On one occasion, quite some time ago now, a StarTrack driver left a card to say that he had tried to deliver a parcel and couldn't, because no-one answered the door. At the time the card was left there was indeed someone to collect any parcel had he tried to deliver it, so we know very well he made no attempt to do so.
My suspicion is that he left an already-completed card quite deliberately without attempting to deliver the parcel at all, and that he did this (as he probably with several customers on his round) because he was being paid per address visited, not per parcel delivered. (I stress that this is a suspicion, not necessarily a fact.) But after the non-delivery was reported because of its blatant incorrectness (and the urgency with which we needed the article), the same driver delivered it a few days later on his next round, complaining to us of the fact that we had complained about his earlier non-delivery!
We've had no problems since, but nor have we had that driver any more either.
Normal Australia Post deliveries, either to our letter-box via the local postman, or by AusPost parcel delivery service, are fine.