Being from the US, I'm actually surprised to learn it isn't the same everywhere. How do people get their packages if they work during delivery time every day? Does everyone just drive down to the shipping warehouse?
Also, I'm not sure how it works outside the US, but here frequently packages with higher value items will require a signature and therefore wouldn't be left on a porch.
In India, people may prefer to get these delivered at work. For those who give their home address but aren't available there, usually what happens is that the delivery/courier person calls the recipient and figures out what to do (come back later or hand it over to building security or leave it with a neighbor, etc.). In some cases, the courier delivery person may not call, and then the package may just go back to the sender, involving lengthy processes to get it shipped back.
> How do people get their packages if they work during delivery time every day?
One option is to have the package delivered to the work address, or if you live in a building with a reception, the receptionist receives the package for you.
(Also, where I live a house's porch is normally behind the fence, so to leave a package in the porch it would have to be thrown over the gate.)
Also, I'm not sure how it works outside the US, but here frequently packages with higher value items will require a signature and therefore wouldn't be left on a porch.