The ATO (Australian Taxation Office) maintains a record of Superannuation accounts in Australia. Unfortunately the ATO is unlikely to provide this information to you if you have not yet obtained Probate or Letters of Administration. This can be a catch-22 situation if the superannuation is the only estate asset (because its value must be disclosed in the application).
If you would like to find out which funds your loved one held accounts with, and the value of these accounts, please get in touch with us.