You'll only know when you start moving into your intended condo/serviced residence as different projects have different rules like what the others had mentioned.

For the condo I'm living in, the guardhouse only recently allows parcels to be delivered to them. Previously our management disallows it and insists on the delivery guy to contact the owner to come down to collect it personally.

If you're talking about heavy and/or bulky items such as TV, sofa, bed, etc., then you need to inform the management on when you'll be expecting the item(s) to arrive and fill up a form. Do give a range of a few days to a week in case the transporter is unable to make it on that given day.

As for mail, the mailman will just post it into the unit's respective mailbox which is on the ground floor outside the lift lobby.

For food delivery, the delivery rider will wait at your tower's lobby and you'll have to come down and collect it personally. But like the previous poster above me mentioned, no 'direct to your doorstep' delivery for security reasons.