Mr Caputo, who is director of First National Real Estate in Dee Why, is due to give evidence on Tuesday, according to an initial witness list released by ICAC on Thursday night. Asked the reason for his appearance, Mr Caputo said: ''I don't want to make any comment about that.'' The four-week inquiry, codenamed Operation Spicer, will examine allegations that former energy minister Chris Hartcher and two other state Liberal MPs, Chris Spence and Darren Webber ''corruptly solicited, received and concealed payments from various sources'' in return for favours. In another potential headache for the federal Liberals, also giving evidence is Karen McNamara, the MP for federal seat of Dobell on the Central Coast. During her preselection interview in 2012, Ms McNamara claimed to have raised as much as $100,000 as campaign manager for Mr Webber - the state MP for Wyong - before the 2011 state election.

But this was questioned at the time by Liberal state executive member Hollie Hughes, who had confirmed that official party receipts were far lower. Ms Hughes has also been called to give evidence. As well, while not named as a witness in the inquiry's first week, Senator Arthur Sinodinos is expected to make a return visit to the ICAC witness box. In the previous corruption inquiry he admitted that he did not inform senior Liberal ministers he was lobbying that he stood to make up to $20 million if they granted his water infrastructure company the deal he sought. Senator Sinodinos was a chairman of Australia Water Holdings before becoming a senator in 2011. He has temporarily stood aside from his position as federal Assistant Treasurer. Former policeman Darren Jameson is also on the list. Mr Jameson was backed by Mr Hartcher to secure preselection in the federal seat of Robertson at the 2010 federal election. Aaron Henry, a Liberal party member whom Mr Hartcher is hoping will succeed him in his seat of Terrigal, is also due in the witness box, along with Mr Hartcher's former adviser Charles Perrottet.

Mr Perrottet is the brother of newly-appointed NSW finance minister Dominic Perrottet. At the very time Mr Tinkler's stable of horses were alleged to have gone without feed because his racing stud Patinack Farm could not pay suppliers, the former billionaire is understood to have channelled money into a secret slush fund run by Tim Koelma, a former aide to Mr Hartcher. Also on the witness list is Pat Sergi, a Sydney property developer was named at the Woodward royal commission as being a principal in Robert Trimbole's Griffith drug syndicate. A decade ago Mr Sergi and two business associates lobbied Liberal politicians to prevent a Victorian Mafia figure being deported. Six months after then immigration minister Amanda Vanstone overturned the man's deportation order, his relatives and associates donated at least $30,000 to the NSW Liberal Party. A subsequent police investigation found no wrong doing on Mrs Vanstone's part. The man is awaiting trial in Victoria for money laundering and drug importation. Mr Sergi also enjoyed close ties to controversial former Labor identity Joe Tripodi who owned shares in Mr Sergi's development company which bought and sold government land.

Also on the witness list is wealth property developer Iwan Sunito, whose Crown Group was offered a $50 million half share in the company at the subject of the previous inquiry, Australia Water Holdings. for $50 million. The Herald has previously revealed that the Obeid family bought a string of discounted apartments, including the penthouse, in Crown's residential development in Top Ryde. Labor powerbroker Eddie Obeid negotiated the purchase of the apartments with Mr Sunito.