The state’s corruption watchdog has written to Berejiklian government ministers requiring them to disclose details about how they interact with paid political lobbyists.

The correspondence, sent over the holiday period, is part of the Independent Commission Against Corruption's Operation Eclipse investigation into the regulation of lobbying, access and influence.

NSW Customer Service Minister Victor Dominello is understood to be one of the ministers to receive the ICAC letter. Credit:Nick Moir

Gladys Berejiklian's office declined to comment on how many ministers had been contacted by the ICAC and whether a request for information had also been received by the Premier's office.

"It would not be appropriate for the NSW government to comment on active ICAC investigations," her spokeswoman said. "All questions regarding the investigation should be directed to ICAC."