The Senate expenses scandal may have generated a lot of headlines this year, but apparently it hadn't prompted a single email, memo or even a sticky-note in Stephen Harper's own department by the height of the controversy in June.

The Privy Council Office, the bureaucracy that serves the prime minister's operations, reported in June it did not have a single document of any description related to the scandal involving senators Mike Duffy, Patrick Brazeau, Mac Harb and Pamela Wallin or others involved in the controversy, including Harper's former chief of staff Nigel Wright.

This revelation came in response to requests by reporters and others using the Access to Information Act to obtain all documents in the possession of the Privy Council relating to the Senate scandal.

The Privy Council website indicates a total of 23 such requests about the Senate had been processed by June.

Every one of the requests yielded "zero" pages, and a notation that the information requested "does not exist."

Here's a look at the unsuccessful requests: