The Morrison government is facing questions over proposed new laws to criminalise the use of large amounts of cash for payments.
In the 2018-19 federal budget, the Morrison government announced it would introduce an economy-wide cash payment limit of $10,000 for payments made or accepted by businesses for goods and services.
Transactions equal to, or in excess of this amount would need to be made using the electronic payment system or by cheque.
The aim of the laws - expected to start from January 2020 - is to tackle tax evasion and other criminal activities.
However, CPA Australia said in a submission to the draft bill that while it supported action to crack down on the black economy "to link all large cash transactions to criminality is a step too far".
"The proposed offences can lead to an individual being convicted, fined and/or jailed for up to two years for merely using cash, regardless of the purpose or nature of the transaction," CPA Australia's Dr Gary Pflugrath said.
One Nation says it will oppose the laws when they come to parliament.
"Legal tender is legal tender," Senator Malcolm Roberts said.
