After a loved one has died, one of the small nasty aftershocks is receiving junk mail addressed to that person. The Australian Bereavement Register (TABR) lets you register the name and address of anyone dead to eliminate unsolicited mail.
The service is free to use (companies which send direct mail pay a fee to TABR to ensure that their lists don’t contain unwanted addresses). If you do receive unwanted mail after registering, you can forward it reply-paid to TABR, which will follow up with the relevant organisation. Definitely a useful option when you’re going through the post-death paperwork.