A member of An Garda Síochána was remanded on bail for sentencing after pleading guilty to 11 of 212 charges related to alleged deception, theft and receiving corrupt payments.
John O'Halloran, 46, from South Douglas Road, Cork, was due to face trial at Cork Circuit Criminal Court on Tuesday.
However, he pleaded guilty to three counts of corruption, one count of making a gain by deception and seven counts of theft on various dates between June 2009 and September 2015 in Cork.
O'Halloran was based at Barrack Street Garda Station in Cork city and is still a serving officer but defence counsel Ronan Munro SC said his client fully accepted that his membership of the force was now incompatible with his guilty pleas.
Judge Seán Ó Donnabháin adjourned the matter until 23 November to allow for O'Halloran's departure from An Garda Síochána.