By agreeing to my terms a buyer is accepting risk and if they decide not to insure delivery the loss is theirs subject to the provisions of Auspost if that is their choice of shipper.
Here is a great piece of reading
http://www.legislation.nsw.gov.au/fullhtml/inforce/act+1+1923+FIRST+0+N
My reading supports my position.
35 Delivery to carrier
(1) Where in [...]
Continue reading So – when does title and responsibilty change when selling goods??
