Transfield defends Senate inquiry evidence

The Australian-operator of the Nauru immigration detention centre has denied misleading a Senate committee investigating abuse at the facility.

Transfield Services says it stands by the evidence it provided at hearings about its strict alcohol and drug policy, well-promoted whistleblower hotline and proper handling of abuse incidents despite claims to the contrary.

The company was committed to openness and transparency and the care of asylum seekers was paramount, it said in a statement to the ASX on Monday.

"Whether substantiated or not, all incidents are investigated and acted upon as part of the company's welfare led service," Transfield said.

Employees and contractors were encouraged to raise concerns about any known or suspected unlawful or inappropriate conduct within the organisation, it said.

The company said any claims of illegal activities had been referred to the Nauruan police force.

It said media reports of an absence of alcohol testing in Nauru were factually incorrect.

"Transfield Services is committed to the highest standards of probity and transparency," the company said.