It contains information that would be able to convict Count Olaf and his associates of various crimes, as well as (presumably) information about fires, including the fire that destroyed the home of the Quagmires. It also had information about Hotel Denoument being the last safe place. It was removed from the Library of Records for an investigation (Who conducted the investigation is unknown), but the last page was left behind and later recovered by the Baudelaire orphans. It showed a photograph of their parents, Jacques Snicket, and another man on the porch of 667 Dark Avenue, and also contained some text:
- "Because of the evidence discussed on page nine, experts now suspect that there may in fact be one survivor of the fire, but the survivor's whereabouts are unknown."
- —Note on Page 13 of the Snicket file.
The Baudelaire children took this to mean that one of their parents was still alive, however, the actual survivor referred to was Quigley Quagmire, who had survived the fire that burned down his house, though his siblings were not aware of it. Despite this, it is possible that the survivor was Beatrice Baudelaire, who is believed by some fans to have later perished in the Duchess of Winnipeg's fire.
The file was given to Count Olaf in chapter 6 of The Slippery Slope by The Woman with hair, but no beard, and was described as information that could land all three of them in jail. It was never mentioned again or referenced again in the series.
- The other man in the photograph is commonly believed to be Lemony Snicket.
- Due to the Snicket File never mentioned again after The Slippery Slope, it can be presumed that the files were destroyed.