I see why Buvelot is uncomfortable with the term. I rather share that feeling. Nevertheless, Stanley Gibbons, Philatelic Terms, says that a Cinderella is "virtually anything resembling a postage stamp, but not issued for postal purposes by a government postal administration." Scott agrees, calling it "a catch-all term ... to describe phantoms, fantasies, bogus items, municipal issues, exhibition seals, local revenues, transportation stamps, labels, poster stamps and many other types of items." Williams, Fundamentals of Philately, says "The bounds of Cinderellas have not been authoritatively established," but adds that "A widely accepted definition is 'local stamps, telegraph stamps, fiscals, bogus and phantom issues, Christmas seals, registration labels, advertisement and exhibition labels.' That is the definition accepted by the Cinderella Stamp Club, established in London, England, in 1959."