The 2016 ACETCA annual gala dinner,attended by several Labor and Liberal MPs.
Dr Tan said Professor Hamilton and Mr Joske's claim was wrong,and that his organisation had nothing to do with spying.
"There are no spies in our organisation that I know of. If there is,there’s nothing we do to spy on,"he said.
Dr Tan conceded ACETCA had donated to both major political parties and universities,which he described as a smaller part of its contributions to charitable organisations including St John Ambulance and the Rural Fire Service.
"Yes,we’ve made friends with politicians as would any Australian organisation like ours,"he said."But there’s no mischief behind it and no hidden agenda."