More than 40 businesses will be asked to provide evidence of transactions to confirm the legitimacy of their ChooseCBR voucher participation, as part of an audit into the scheme.
Canberra businesses who took money outside of regular work hours or used a high volume of vouchers during the economic stimulus package will form part of an independent report.
The businesses were responsible for more than 440 transactions which took place during the troubled $2 million scheme which was rolled out in June.
ACT government business minister Tara Cheyne defended the scheme on Friday telling morning radio no evidence of fraud had been discovered so far.
"I can't see why we wouldn't be making our assessment of this spot check of the 5 per cent of business public," she told ABC.
A sample of businesses which have not been flagged for potential misuse of the system will make up the 5 per cent.
The independent review which is due to commence soon was scheduled to be made public before local government's last sitting day of this year.
Potential illegal spending in June followed a warning from auditors who examined spending from the trial of the program in December.
A red flag was raised on 13 businesses who were highlighted for a string of potentially suspicious transactions.
The rollout went ahead in June even though, one business didn't respond to requests for receipts, another said they no longer had receipts and others did not provide all the information requested from the government.
Ms Cheyne said on Friday she accepts that ongoing issues with the website crashing did result in a "bit of a frenzy" with spending once it finally got up and running.
She said while ACT government was not considering doing it again, "never say never".
