If you’d like extra peace of mind when sending an item, you can add Extra Cover. It provides loss or damage cover up to the specified value of your item (from $100 up to $5,000) while it’s being carried by Australia Post.
Australia Post Extra cover web page https://auspost.com.au/sending/send-within-austral...
Signature on delivery
If you require signature on delivery then add this option here there is a flat cost of $2.50