When has the government used "Cannot Confirm or Deny"?

Dear Mr. Lang,

Thank you for posting your request on History Hub!

We searched the National Archives Catalog and located 4 items in two collections that include the phrase “cannot confirm or deny.” We also located 86 file units & 10 items in various record groups/collections that include the phrase “confirm nor deny.” These records have been digitized and are available for viewing via the Catalog.

In addition, we searched the Access to Archival Databases (AAD) and located the series Central Foreign Policy Files, ca. 1973 - 12/31/1979 in the General Records of the Department of State (Record Group 59) that includes 19 Electronic Telegrams from 1975-1976 & 1979 using the phrase “cannot confirm or deny” and 214 Electronic Telegrams from 1973-1979 using the phrase “confirm nor deny.” These telegrams are available digitally via AAD.

We hope this is helpful. Best of luck with your research!