I too live in a unit and see your issue and yes, Units do pose an issue for parcel deliveries. A safe drop of parcels is compromised by other people using the same facilities and a mailbox needs to be large enough to insert the package but also secure . Again, not always possible with units. .If a safe drop is available according to the scanner then at the front door or mailbox is usual but every situation is different.Not advisable to use Safe drop unless you do have a reasonable secure private location.
My job is a relief delivery officer for Post so I cover other rounds for holidays sickies and whatever and Units can be difficult for access and security of goods, My rule is if I cant access for a signature or it doesnt fit in the mailbox it is carded for security. My advice first of all, go to the auspost website and sign up for a MYPOST account, its FREE.... from there you can apply for SMS tracking updates and also control certain aspects of delivery like changing location of delivery like to work or a friends place., if all the details of what can and cant be done are on the site. You can also see your options for insurance and compensation though it is dependant on the sender using the correct procedure when posting.
When placing the order, tell the supplier that a signature MUST be received. This ensures that the item will not be left unattended.STARTRACK parcels MUST have an Authority To Leave barcode to leave. If someone is not home to sign it will be taken to the post office and a card left advising you.
You can also apply at the post office for a secure post box or at some locations, lockers.
I know the delivery people that service my area and have told them where to leave my parcels if they can. I also redirect some to work and the others I pick up from the local post office.I know close to 90% of the people on my regular rounds by name and I talk to them about where to leave items, Get to know your postie and they can tell you what they can and cant do for you.
I hope some of the info has been helpful
Cheers.