The government on January 1 announced its decision to recommend CAG audit of the finances of the three power distribution companies -- BSES Rajdhani Power Ltd, BSES Yamuna Power Ltd and Tata Power Delhi Distribution Ltd.
Sources said CAG officials paid a "courtesy visit" to the three companies before launching their audit.
They said the Delhi government is yet to finalise the terms of reference of the CAG audit, which has delayed formal launch of the auditing process.
Earlier this month, the Delhi government warned the discoms that their licences could be cancelled if they do not cooperate with the CAG in audit.