1. Centrelink and Veteran's Affairs if applicable
  2. Banks and other financial institutions
  3. Employers
  4. Home care nursing services, meals on wheels
  5. Insurers and superannuation funds
  6. Hire purchase companies
  7. Australian Taxation Office
  8. Telephone companies
  9. Medicare (or private health funds)
  10. Electoral Office
  11. Local Authorities (councils, state authorities)
  12. Motor Vehicle Registry
  13. Clubs and organisations
  14. public services such as libraries
  15. Solicitor
  16. Public Trustee
  17. Landlord
  18. Executor of will
  19. Doctor
  20. Dentist
  21. Post Office

Before you start, it may help to look for any records or documents showing contact with any of the organisations on the checklist. You can use these documents to quote important reference numbers such as customer reference number, Medicare number or health fund membership number in your letters.
Some important documents to look for include: