Joint account eligibility for both applicants. To open a Vanguard Personal Investor joint account, both applicants must: 

You're an Australian resident aged 18 years or over.
Have an Australian residential address.
You're an Australian primary tax resident.
You have an Australian mobile number and bank account.
To open a Vanguard Personal Investor individual account, please make sure you have the following ready:
Having your mobile number is an added level of security.
You may need your passport, Medicare card or an Australian driver's licence.
You'll need an Australian bank account BSB and account number.
Choose to add your TFN or claim a tax exemption.