They usually have it setup in such a way that all packages for a specific complex are with the same guy or maybe two or more guys(holidays and big sales). If it is prepaid, the package is left at a "mail room", they guy in charge there informs us of the delivery and then delivers it to us end of day. For the COD packages, he then goes about delivering it to the respective apartments.how does it work with delivery guys of amazon/flipkart/myntra/BigBasket/Grofers? is there a different system setup for these folks? delivery guy on bike carrying 2-3 packages or a van full of deliveries for multiple apartments in the society?