It seems on the face of it, fraud / misleading / obtain money by deceptive conduct.
They can be charged criminally for the offence.
Such offences carry significant penalties, fines and custodial sentences.
CRIMES ACT 1900 - SECT 192E
(1) A person who, by any deception, dishonestly:
(a) obtains property belonging to another, or
(b) obtains any financial advantage or causes any financial disadvantage,
is guilty of the offence of fraud.
Maximum penalty: Imprisonment for 10 years.
(2) A person’s obtaining of property belonging to another may be dishonest even if the person is willing to pay for the property.
(3) A person may be convicted of the offence of fraud involving all or any part of a general deficiency in money or other property even though the deficiency is made up of any number of particularsums of money or items of other property that were obtained over a period of time.
(4) A conviction for the offence of fraud is an alternative verdict to a charge for the offence of larceny, or any offence that includes larceny, and a conviction for the offence of larceny, or any offence that includes larceny, is an alternative verdict to a charge for the offence of fraud.
Some lengthy references:
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