Mr Key this afternoon denied that Slater, who is at the centre of Hager's claims of a National Party dirty tricks campaign, had received favourable treatment, or that his office had anything to do with the release of the document.
This evening an SIS spokesman said the director was "responsible for NZ SIS Official Information Act responses and made the decision to release and what to release in this case".
"Under the no surprises convention the director or a representative would normally inform the minister's office about what is being released under the OIA.
"That's what occurred in this case. Neither the PM or his office expressed a view as to whether the information should be released or to whom or when."
• Check out the full coverage of Hager's book here.