If you choose ‘authority to leave’ for your delivery, i.e. delivery without a signature, you have advised Australia Post that they may leave your parcel unattended at your premises in accordance with your instructions. You agree that the parcel is deemed 'delivered' once left at your premises.
Please note, Aquila cannot be held liable for any missing or damaged items delivered using ‘authority to leave’. Instead an enquiry would need to be lodged directly with Australia Post.