Hard to explain in title, but most postmen/women in my town never ring the buzzer to let me know I have a parcel or something recorded delivery, they just put one of those red cards in.
I notice its always the ones that come between 8am-11am, as normally ones after that are fine, then again they ring every buzzer in the building and let the first person who comes down to sign for it, the parcel.
ParcelFarce are similar, A lot of times I have been in and an item doesnt arrive, I check tracking number it says "attempted delivery card left" but no one came and I dont have a parcel.
The funniy thing about this is I live on same street as the main post office and sorting office! I can walk there and back to my flat in 4 minutes. and thats going down 3 flights of stairs.