Hi Tammy,
I hope this helps:
1. Is your mother entitled to your late father's superannuation?
It would appear so.
Superannuation is passed down to the spouse of the deceased initially (mum), if there is no spouse, then children will be taken into consideration and other financial dependants.
2. You say your mother is now in a relationship with a con artist. You infer the con artist may access your late father's superannuation funds via mum.
As per Lance, you would be best to speak with a lawyer. However, this would be very tough to enforce. Unless of course the con artist is stealing / inappropriately accessing the funds.
3. You ask if you can find out whom your late father nominated as his beneficiaries?
Yes, you can ask. You can always ask a question.
However, a beneficiary nomination is generally non-binding (no witness required) unless your father signed a binding nomination (requires witnesses etc).
If it was a non-binding nomination, the Trustee only takes this into consideration when determining to whom the superannuation benefits should be paid to.
Cheers,