The Library and Archives Canada collection of government records on UFOs was acquired from the following four federal departments and agencies:
These documents were accumulated between 1947 and the early 1980s and represent all records filed with the federal government on UFOs. There are approximately 9,500 digitized documents in a variety of formats, including correspondence, reports, memos and procedures. Some are specifically concerned with particular UFO sightings, while others are more generic in nature; these may consist of reporting forms and procedures for recording events.
Although most documents contain a date (pertaining either to a sighting date or the date the document was actually created), some are undated. Similarly, approximately half of the documents refer to a specific UFO sighting location, while the others fail to mention a particular location.