What Does Filing Off the Serial Numbers Mean?
Fandom CultureConverting a fanfic into publishable original fiction by renaming characters and scrubbing identifiable canon elements. Fifty Shades of Grey, originally a Twilight fanfic, is the famous example.
Filing Off the Serial Numbers in Practice
The phrase borrows from stolen-goods slang: remove the identifying marks and the work can pass as original. The practice is old — professional authors quietly launched careers from fic long before it had a name — but it became headline news when E.L. James reworked her Twilight fanfic Master of the Universe into Fifty Shades of Grey, the most commercially successful filed-off fic in history. Fandom's feelings are genuinely mixed: pride that fic writers go pro, alongside discomfort when monetization touches work built on community feedback, a tension covered by the related term pulled-to-publish. How thoroughly the serial numbers must be filed — when an AU romance stops being recognizably anyone's canon — is a perennial and unresolved debate.
Example usage
"Her agent loved the novel, which is good, because three of us recognize it as the bakery AU with the serial numbers filed off."
Related Terms
Pulled to Publish (P2P)
The practice of removing a fanfic from the internet, filing off the serial numbers — renaming characters, scrubbing canon details — and publishing it commercially as original fiction.
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AU (Alternate Universe)
Short for Alternate Universe: a story that deliberately changes fundamental facts of the canon setting — the time period, the world's rules, or the characters' circumstances. Coffee shop AUs, no-powers AUs, and modern AUs are classic examples.
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Original Work (AO3)
AO3's fandom category for fiction that isn't based on existing media — wholly original stories posted to the archive. It is one of the largest 'fandoms' on the site.
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