If you're sending a valuable item by mail, you might like to take out Extra Cover, and also check local regulations if you're sending it overseas.
Some countries won't accept any valuable items into their mail system. Other countries might accept them if they're insured, and some countries accept valuable items in certain services but not others.
All postal organisations consider the following to be valuable:
Securities of any kind payable to bearer
Platinum, gold or silver, manufactured or otherwise
Other articles of high intrinsic value
Precious stones (all valuable natural mineral stone, silica or substances extracted from the group, whether in its natural state or refined, processed, set or treated)
Coins, bank notes and bullion
In addition to this list, we won't deliver bullion, bank notes or coins in any international services. This includes all Australian notes and coins, the bank notes or currency notes and coins of any other country and coins made from precious metals, whether or not such coins have a denomination..
This prohibition applies even if the destination country does accept valuables at their end.