Tuffey's name came up in media reports last week as one of three former New Zealand internationals -- along with Chris Cairns and Lou Vincent -- linked to the inquiry.
Tuffey, who took 187 wickets in an 11-year international career, said he would cooperate in the ICC probe.
"Mr Tuffey does not believe he is the focus of this investigation. He intends to fully co-operate with the ICC and provide them with any relevant information in his possession," Tuffey's lawyers said in a statement here.
The ICC probe, however, did not involve any games played in New Zealand.